Organic chemistry : Alenes and Alkynes quiz 5

written by gogorabei | June 9, 2023

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Organic chemistry: Alkenes and Alkynes Quiz 4

written by gogorabei | June 9, 2023

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Organic chemistry : Alkanes quiz 3

written by gogorabei | June 9, 2023

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Organic chemistry : Quiz2 – Alkanes

written by gogorabei | June 9, 2023

Created on June 08, 2023 By

gogorabei

Organic chemistry: Alkanes

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(36) The volume of gases produced from the thermal cracking reaction ………… are greatest

(a) C₆H_14(g) >>> 3C₂H_4(g) + H_2(g).

(b)C₈H_18(g) >>> 2C₃H_8(g) + C₂H_{2 (g)}

(c) C₁₀H_22(g)>>> C₈H_18(g)+ C₂H_4(g)

(d) C₁₂H_26(g) >>> C₈H_18(g) + 2 C₂H_4(g)

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(34) The gas which is obtained from thermal catalytic cracking of octadecane C₁₈H₃₈ is ……….

(a) CO₂

(b) C₁₈H₃₆

(c) C₃₆H₇₄

(d) C₉H_18.

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(33) Both of ………. are obtained from the thermal catalytic cracking of octane.

(a) hexane and ethane

(b) Butene and butane.

(c) heptane and methane

(d) propane and pentane

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(32) Chlorine reacts with methane gas forming …………. in the presence of ultraviolet rays.

(a) chloromethane and hydrogen

(b) chloromethane and Hydrogen chloride

(c) dichloromethane and hydrogen

(d) dichloromethane and trichloromethane

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31 ) Freons are used in air conditions and fridges, because they are ………..

(a) cheap.

(b) liquefied easily.

(c) non-poisonous and don't cause erosion.

(D) (a), (b) and (c).

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(30) The molecular formula of chloroform is ………..

(a) CCl₄

(b) CH₂Cl₂

(c) CH₄

(d) CHCI₃.

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(29) Alkanes react with halogens in the presence of ultraviolet rays by

(a) elimination.

(b) condensation.

(c) Substitution.

(d) reduction.

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(28) The gas which burns in air forming two gases; one of them turns the clear limewater turbid and the other turns the anhydrous copper (II) sulphate into blue is …….

(a) Ethane.

(b) carbon monoxide

(c) hydrogen

(d) gasoline

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(27) Alkanes which contain more than 17 carbon atoms are exist in state.

(a) Solid

(b) liquid

(c) vapour

(d) gaseous

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(26) The boiling point of butane is less than that of ……….

(a) ethane.

(b) propane.

(c) methane.

(d) Hexane

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(25) In hot countries, the fuel cylinders contain large amount of ……… gas.

(a) ethane

(b) propane

(c) Butane

(d) pentane

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(24) In cold countries, the fuel cylinders contain high amount of

(a) methane

(b) ethane

(c) Propane.

(d) butane

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(23) Which of the following compounds have the highest boiling point?.......

(a) Normal Hexane..

(b) Normal pentane.

(c) 2,2-dimethyl propane.

(d) 2-methyl butane

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(22) Gasoline consists of compounds which contain …….. carbon atoms

(a) from 1:4

(b) from 4:5

(c) from 5:17.

(d) more than 17

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(21) Soda lime is a mixture of ……..

(a) caustic soda and calcium carbonate

(b) caustic soda and Quick lime

(c) sodium carbonate and quick lime

(d) caustic soda and slaked lime

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(20) The dry distillation of anhydrous sodium acetate with soda lime produces ……

(a) ethane.

(b) Methane.

(c) propane

(d) butane

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(19) The boiling point of ……….. is less than that of the other three compounds

(a)C₂H_{6 .}

(b) CH₃(CH₂)₂CH₃

(c)CH₃(CH₂)₄CH₃

(d)C₈H₁₈

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(18) With increasing the molecular mass in alkanes, the property ………. doesn't increase

(a) boiling point

(b) Ability to burn

(c) melting point

(d) viscosity

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(17) Complete burning of 1 mole of ……….. produces 3 mole of CO2, and 4 moles of H2O

(a) C₃H_8.

(b) C₃H₄

(c) C₂H₄

(d) C₂H₂

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(16) 1 L of gas …… reacts with 5 L of O₂ , at STP

(a)CH₄

(b) C₂H₆

(c) C₃H₈.

(d)C₄H₁₀

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(15) Burning of 20 cm³ of gas …… in an excess of O₂

At STP produces 60 cm3 of CO₂

a) C₃H₆.

(b) C₄H₁₀

(c) C₆H₁₂

(d) C₆H₁₄

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(14) The gas which causes the decay of the ozone layer is

(a) CH₃CH₂CH₃

(b) CH₃CHCI₂

(C) CH₃OCH₃

(D) CF₂Cl₂

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(13) 2-methyl pentane is considered the isomer of the compound ………….

(a) 2-methyl butane.

(b) (2,2-dimethyl Butane

(c) 2,2-dimethyl pentane

(d) 2,2-dimethyl propane

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(12) The number of ethane molecules which are present in 15 g of it equals to……….. molecule (c=12,H=1)

(a) 0.5

(b.) 3.01 x 10²³

(c) 6.02 x 10²³

(4) 2.04 x 10²³

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(11)2,2-dimethyl pentane contains ……. methylene group (-CH2)

(a)1

(b.)2

(c)3

(d)4

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(10) On removing hydrogen atom from propane,

(a)-CH₃

(b)-C₃H₇.

(c)-C₂H₅

(d)C₄H₉

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(9) The general formula of alkyl group is …….

(a) CnH2n

(b) C_nH_2n+2

(c) C_nH2_n+1.

(d)C_n H_2n-1

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(8) In the homologous series, each compound exceeds the previous by

(a)-CH₃

(b.)-CH_₂

(c)-C₂H₅

(d)-C₆H₅

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( 7) The alkane which contains 4 carbon atoms has …. sigma bonds.

(a) 11

(b) 12

(d) 14

(C) 13

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(6) The alkane consists of 14 atoms which contains ……… carbon atoms.

(a) 4.

(b) 7

(c) 8

(d) 10

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(5) The number of carbon atoms in the alkane which contains 10 hydrogen atoms is ………. atoms.

(a) 4.

(b) 5

(c) 8

(d)10

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(4) The number of hydrogen atoms in the alkane which contains 14 carbon atoms is -----

(a) 14

(b) 26

(c) 28

(d) 30.

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(3) The number of hydrogen atoms in the alkane which contains 4 carbon atoms is atoms.

(a) 5

(b) 7

(c) 8

(D) 10

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(2) The molecular formula of alkane which contains five carbon atoms is ….

(a) C₅H₈

(b) C₅H₉

(c) C₅H_12.

(d) C₅H₁₀

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(1) The general formula of alkanes is ….

(a) C_nH_2n+1 (b) C_nH_2n+2.

(c) C_nH_2n(d) C_nH_2n-2

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Quiz2:chapter3: chemical equilibrium

written by gogorabei | June 9, 2023

Created on January 22, 2023 By

gogorabei

Quiz2:chapter3: chemical equilibrium

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(36) The equilibrium of the reaction:

N_2(g) + O_2(g) ↔ 2NO_(g) - energy

is not affected by ---------------

(a) increasing the temperature.

(b) increasing the concentration of nitrogen gas

(c.) decreasing the pressure.

(d) removing nitric oxide from the reaction

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(35) In the reaction:

2SO_2(g)+O_2(g) ↔ 2SO_3(g) + energy

the formation of sulphur trioxide increases as …………………

(a) the temperature decreases.

(b) the pressure increases.

(d.) (a), (b) and (c).

(c) SO₃ is removed from the reaction.

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(34) Enzymes act as -----.agents in biological and industrial processes.

(a) oxidizing

(b.) catalytic

(c) drying

(d) antiseptic

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(33) The catalysts are considered

(a) metallic elements.

(b) basic oxides.

(c) metallic compounds.

(d.) (a), (b) and (c).

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(32) All the following catalyst properties may be affected during the chemical reaction.except

(a) its appearance.

(b) its surface area.

(c) its physical properties.

(d.) its chemical structure.

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(31) The catalyst accelerates the chemical reaction because

(a) it increases the distances between the reactants.

(b.) it decreases the activation energy of the reactants.

(c) it affects the equilibrium point.

(d) (a). (b) and (c).

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(38) Increasing the pressure in the following equilibrium reaction:

N_2(g)+ O_2(g) ↔ 2NO_(g)– energy

causes the reaction to shift in the direction which -----------

(a) decreases the absorbed heat.

(b) increases the concentration of nitrogen gas.

(d.) no correct answer.

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(39) The rate of the forward reaction increases by increasing the temperature and decreasing the pressure in the reaction

(a) H_2(g)+ I_2(g) ↔ 2HI_(g) ΔH = +ve

(b)NO_(g) ↔ ½ O_2(g)+ ½ N_2(g) ΔH = -ve

(c) N₂H4_(g) ↔ N_2(g)+2H_2(g) ΔH = -ve

(d.)2NH_3(g) ↔ N_2(g) +3H_3(g) ΔH = +ve

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(40) The gelatinous layer in photographic films contains ------

(a) sodium chloride.

(c) silver nitrate.

(b.) silver bromide.

(d) potassium iodide.

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(51) Consider the following equilibrium system:

2O_2(g) ↔ 3O_2(g) Kc=36

What is the concentration of O_3(g) when the equilibrium concentration

Of is 5.8 x 10^-2mol/L ? -----------

(a.) 2.32 x 10^-3 mol/L

(b) 4.54 x 10^-3 mol/L

(c) 3.87 x 10^-3 mol/L.

(d) 8.7 x 10^-3 mol/L.

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(50) Consider the following equilibrium system:

N_2(g)+ O_(g) + heat ↔ 2NO_(g)

The amount of NO can be increased by

(a) decreasing the amount of O₂

(b.)increasing the temperature of the reaction.

(c) increasing the pressure.

(d) decreasing the amount of N₂

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(49) Equal volumes of 1 mol/l solutions of W and X are mixture.

The reaction below rapidly reaches equilibrium?

W_(aq) + X_{(aq) ↔}Y_(aq) +Z_(aq)

At equilibrium, the concentration of Y(aq) is found to be 4 mol/L. What is the value of

Kc for the above reaction?

(a) 0.25

(b) 0.44

(c)4.0

(d.)16

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(47) Consider the following system of equilibrium:

H₂O_(V)+CO_(g) ↔ CO₂+H_2(g)

The position of equilibrium shifts to the right as the result of the addition of some extra

H₂O_(V) How will this shift affect the concentrations of the other gases

(a) [CO] increases, [CO₂] decreases and [H₂] decreases.

(b) [CO] increases, [CO₂] increases and [H₂] decreases.

(c) [CO] decreases. [CO₂] decreases and [H₂] increases.

(d.) [CO] decreases. [CO₂] increases and [H₂] increases.

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(46) Consider the following equilibrium system:

CO_(g)+H₂O_(v) CO_2(g)+H_2(g)

Which of the following actions would cause the concentration of H2(g) to decrease?……

(a) Adding CO_(g)

(b) Adding H₂O_(v)

(c) Removing CO_2(g)

(d.) Removing H₂O_(v)

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(45) Consider the following equilibrium system:

N₂H_4(g)+2O_2(g) ↔2NO_(g) +2H₂O_(g)

Which of the following action can cause the position of equilibrium to shift to the right?

(a.) Adding N₂H_4(g)

(b) Adding H₂O_(g)

(c) Removing N₂H_4(g)

(d) Removing O_2(g)

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(44) Consider the following reaction:

CO_2(g) + H_2(g) ↔ CO_(g) +H₂O_(v)

1 mole of CO₂ and 2 moles of H_2(g)are placed in a 2L container. At equilibrium the concentration of CO(g) is 0.28 mol/L.

What is the equilibrium concentration of CO_2(g)and the equilibrium constant, Kc for the reaction?

(a.) 0.22 mol/L, and 0.495

(b) 360 mol/L and 0.0081

(c) 0.44 mol/L and 2.02

(d) 0.72 mol/L. and 123

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(43) Which of the following is incorrect for a system at equilibrium?

(a) The system has a constant mass.

(b) The system acts to oppose disturbances.

(c) The forward and backward reactions proceed at the same rate.

(d.) The reactant and product concentrations vary with time.

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(42) Nitrogen dioxide decomposes on heating according to the following equation

2NO_{2(g) ↔} 2NO_(g)+O_2(g)

When 6.80 moles of NO_2(g) were put into a 1.00L container and heated, the equilibrium mixture contained 1.2 moles of O_2(g) What is the equilibrium constar

Kc for the reaction?...........

(a.) 0.357

(b) 0.655

(c) 1.53

(d) 2.80

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(41) Phosphorus reacts with chlorine according to the following equation:

P_4(s)+6Cl_2(g) ↔ 4PCl_3(g)

What is the equilibrium constant, Kc, for the reaction?

(a)4[PCl₃] / [P4][Cl₂]

(b ) 4[PCl₃] / 6[Cl₂]

(c)[PCl₃]⁴ / [P₄][Cl₂]⁶

(d.) 4[PCl₃]⁴ / [Cl₂]⁶

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(52) An equal number of moles of steam and chlorine are placed in a closed container

at 375 K. The following reaction occurs:

2H₂O_(g)+2Cl_2(g) ↔ 4HCl_(g)+O_2(g) Kc=5x 10^-4 at 375°K

Which of the following relates [Cl2] and [HCI) at equilibrium?

(a) [Cl₂] <2 [HCI]

(b.) [Cl₂]2>[HCI]₄

(c) [C_l2]=2[HCI]

(d) [Cl₂]²= [HCI]₄

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(53) 2SO_2(g)+O_2(g) ↔ 2SO_3(g) Kc= 4.5

In an experiment, a mixture of 4 moles of sulphur dioxide and 1.5 moles of oxygen is allowed to reach equilibrium.

The moles of SO₃ are -----------------

(a) 5.5 moles.

(b) 4 moles.

(c) 3 moles.

(d.) less than 3 moles.

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(54) Consider the following equilibrium system in a closed vessel reaction:

CH₃CHO_(g) ↔ CH₄ +CO_2(g) ΔH>0

What would happen if some CH_4(g) is added to the system? -------------

(a) The amounts of all substanses increases, relative to their previous equilibrium amounts.

(b) The value of Kc increases.

(c) The amounts of CH₃CHO_(g) and CO_(g) both increase, relative to their previous

equilibrium amounts.

(d.) The amount of CH3CHO_(g)increases, relative to the previous equilibrium amounts.

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(61) For which of the following equilibrium system will the amounts of reactants increase

with an increase in the container volume ?

(a) C_(g) +CO_2(g) ↔ 2CO_(g)

(b) N_2(g) + 3H_{2(g) ↔} 2NH_3(g)

(c) 2NO_(g) + O_2(g) ↔ 2NO_2(g)

(d.) Both (b) and (c).

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(60) Consider the following equilibrium system:

PCl_3(g)+O_2(g) ↔ PCl_5(g)

Which of the following statements is/are correct when the volume of the system is decreased?

(a.) The position of equilibrium shifts to the right.

(b) The rate of the backward reaction increases.

(c) The value of Kc increases.

(d) Both (a) and (b).

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(59) Consider the following equilibrium system:

2SO_2(g) + O_2(g)↔ 2SO_3(g) K=1.2×10⁴

Some of SO_2(g)is added to the equilibrium system.

Which of the following statements are correct?

(a.) The position of equilibrium shifts to the right.

(b) The rate of the forward reaction increases.

(c) The value of Kc increases,

(d) Both (a) and (b).

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(58) In the equilibrium system: in presence of _{ZnO /Cr2O3}

CO_(g) + 2H_2(g) ↔ CH₃OH_(g)

Which of the following combinations describes the effect of removing the catalyst (ZnO/Cr2O3) from the above system?

(a) Equilibrium yield decreases and reaction rate decreases.

(b.) Equilibrium yield unchanged and reaction rate decreases.

(c) Equilibrium yield and reaction rate are unchanged.

(d) Equilibrium yield decreases and reaction rate unchanged.

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(57) Methanol is manufactured by the reaction of carbon monoxide with hydrogen in the presence of a ZnO/Cr₂O₇ catalyst:

CO_(g) +2H_2(g) ↔ CH₃OH_(g)

Which of the following combinations describes the effect of increasing the pressure

of the system?

(a) Equilibrium yield decreases and reaction rate increases.

(b) Equilibrium yield decreases and reaction rate decreases.

(c.) Equilibrium yield increases and reaction rate increases.

(d) Equilibrium yield increases and reaction rate decreases.

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(56) The system below reaches equilibrium in a closed reaction vessel

4HCl_(aq)+ MnO_{2(s) ↔} 2Cl₂(g)+2H₂O_(l)+ Mn²⁺_(aq) +2Cl^-_(aq)ΔH<0

Which of the following actions will increase the mass of Cl_2(g) in the equilibrium mixture?

(a) Adding some MnO₂

(b) Increasing the temperature.

(c) Decreasing the volume of the reaction vessel.

(d.) Adding something that precipitates the Mn²⁺ ions.

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(55)* From the following equilibrium constants:

H₂S_{(aq) ↔}H⁺_(aq)+ HS^-_(aq) Kc=9.5

HS^-_{(aq) ↔}H⁺_(aq)+ S^2- Kc=1x10^-19

What is the equilibrium constant for the following reaction?

S^2-_(aq) +2H⁺_(aq)↔ H₂S_(aq)

(a) 9.5 x 10^-27

(b) 9.75 x 10^-14

(c) 9.5 x 10¹¹

(d.) 1.05 x 10²⁶

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(64) Which of the following statements about enzymes are correct?

(a) Enzymes are proteins.

(b) Enzymes increase the rate of biochemical reactions.

(c) Enzymes increase the equilibrium constant of biochemical reactions.

(d.) Both (a) and (b).

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input[type='number'], #ays-quiz-container-13 .information_form input[type='email'], #ays-quiz-container-13 .information_form input[type='checkbox'], #ays-quiz-container-13 .information_form input[type='tel'], #ays-quiz-container-13 .information_form textarea, #ays-quiz-container-13 .information_form select, #ays-quiz-container-13 .information_form option { color: initial !important; outline: none; background-image: unset; } #ays-quiz-container-13 .wrong_answer_text{ color:#ff4d4d; } #ays-quiz-container-13 .right_answer_text{ color:#33cc33; } #ays-quiz-container-13 .wrong_answer_text p { font-size:16px; } #ays-quiz-container-13 .ays_questtion_explanation p { font-size:16px; } #ays-quiz-container-13 .right_answer_text p { font-size:16px; } #ays-quiz-container-13 .ays-quiz-question-note-message-box p { font-size:14px; } #ays-quiz-container-13 .ays-quiz-question-note-message-box * { text-transform:none; } #ays-quiz-container-13 .ays_cb_and_a, #ays-quiz-container-13 .ays_cb_and_a * { color: rgb(0,0,0); text-align: center; } /* Quiz textarea height */ #ays-quiz-container-13 textarea { height: 100px; min-height: 100px; } /* Quiz rate and passed users count */ #ays-quiz-container-13 .ays_quizn_ancnoxneri_qanak, #ays-quiz-container-13 .ays_quiz_rete_avg { color:#fff !important; background-color:#000; } #ays-quiz-container-13 .ays-questions-container > .ays_quizn_ancnoxneri_qanak { padding: 5px 20px; } #ays-quiz-container-13 div.for_quiz_rate.ui.star.rating .icon { color: rgba(0,0,0,0.35); } #ays-quiz-container-13 .ays_quiz_rete_avg div.for_quiz_rate_avg.ui.star.rating .icon { color: rgba(255,255,255,0.5); } #ays-quiz-container-13 .ays_quiz_rete .ays-quiz-rate-link-box .ays-quiz-rate-link { color: #000; } /* Loaders */ #ays-quiz-container-13 div.lds-spinner, #ays-quiz-container-13 div.lds-spinner2 { color: #000; } #ays-quiz-container-13 div.lds-spinner div:after, #ays-quiz-container-13 div.lds-spinner2 div:after { background-color: #000; } #ays-quiz-container-13 .lds-circle, #ays-quiz-container-13 .lds-facebook div, #ays-quiz-container-13 .lds-ellipsis div{ background: #000; } #ays-quiz-container-13 .lds-ripple div{ border-color: #000; } #ays-quiz-container-13 .lds-dual-ring::after, #ays-quiz-container-13 .lds-hourglass::after{ border-color: #000 transparent #000 transparent; } /* Stars */ #ays-quiz-container-13 .ui.rating .icon, #ays-quiz-container-13 .ui.rating .icon:before { } /* Progress bars */ #ays-quiz-container-13 #ays_finish_quiz_13 .ays-progress { border-color: rgba(0,0,0,0.8); } #ays-quiz-container-13 #ays_finish_quiz_13 .ays-progress-bg { background-color: rgba(0,0,0,0.3); } #ays-quiz-container-13 .ays-progress-value { color: #000; text-align: center; } #ays-quiz-container-13 .ays-progress-bar { background-color: #27AE60; } #ays-quiz-container-13 .ays-question-counter .ays-live-bar-wrap { direction:ltr !important; } #ays-quiz-container-13 .ays-live-bar-fill{ color: #000; border-bottom: 2px solid rgba(0,0,0,0.8); text-shadow: 0px 0px 5px #fff; } #ays-quiz-container-13 .ays-live-bar-fill.ays-live-fourth, #ays-quiz-container-13 .ays-live-bar-fill.ays-live-third, #ays-quiz-container-13 .ays-live-bar-fill.ays-live-second { text-shadow: unset; } #ays-quiz-container-13 .ays-live-bar-percent{ display:none; } #ays-quiz-container-13 #ays_finish_quiz_13 .ays_average { text-align: center; } /* Music, Sound */ #ays-quiz-container-13 .ays_music_sound { color:rgb(0,0,0); } /* Dropdown questions scroll bar */ #ays-quiz-container-13 blockquote { border-left-color: #000 !important; } /* Quiz Password */ #ays-quiz-container-13 .ays-start-page > input[id^='ays_quiz_password_val_'], #ays-quiz-container-13 .ays-quiz-password-toggle-visibility-box { width: 100%; } /* Question hint */ #ays-quiz-container-13 .ays_question_hint_container .ays_question_hint_text { background-color:#fff; box-shadow: 0 0 15px 3px rgba(0,0,0,0.6); max-width: 270px; } #ays-quiz-container-13 .ays_question_hint_container .ays_question_hint_text p { max-width: unset; } #ays-quiz-container-13 .ays_questions_hint_max_width_class { max-width: 80%; } /* Information form */ #ays-quiz-container-13 .ays-form-title{ color:rgb(0,0,0); } /* Quiz timer */ #ays-quiz-container-13 div.ays-quiz-redirection-timer, #ays-quiz-container-13 div.ays-quiz-timer{ color: #000; text-align: center; } #ays-quiz-container-13 div.ays-quiz-timer.ays-quiz-message-before-timer:before { font-weight: 500; } /* Quiz title / transformation */ #ays-quiz-container-13 .ays-fs-title{ text-transform: uppercase; font-size: 21px; text-align: center; text-shadow: none; } /* Quiz buttons */ #ays-quiz-container-13 .ays_arrow { color:#000000!important; } #ays-quiz-container-13 input#ays-submit, #ays-quiz-container-13 #ays_finish_quiz_13 .action-button, div#ays-quiz-container-13 #ays_finish_quiz_13 .action-button.ays_restart_button, #ays-quiz-container-13 + .ays-quiz-category-selective-main-container .ays-quiz-category-selective-restart-bttn, #ays-quiz-container-13 .ays-quiz-category-selective-submit-bttn { background: none; background-color: #27AE60; color:#000000; font-size: 17px; padding: 10px 20px; border-radius: 3px; height: auto; letter-spacing: 0; box-shadow: unset; } #ays-quiz-container-13 input#ays-submit, #ays-quiz-container-13 #ays_finish_quiz_13 input.action-button, #ays-quiz-container-13 + .ays-quiz-category-selective-main-container .ays-quiz-category-selective-restart-bttn, #ays-quiz-container-13 .ays-quiz-category-selective-submit-bttn { } #ays-quiz-container-13 #ays_finish_quiz_13 .action-button.ays_check_answer { padding: 5px 10px; font-size: 17px !important; } #ays-quiz-container-13 #ays_finish_quiz_13 .action-button.ays_restart_button { white-space: nowrap; padding: 5px 10px; white-space: normal; } #ays-quiz-container-13 input#ays-submit:hover, #ays-quiz-container-13 input#ays-submit:focus, #ays-quiz-container-13 #ays_finish_quiz_13 .action-button:hover, #ays-quiz-container-13 #ays_finish_quiz_13 .action-button:focus, #ays-quiz-container-13 + .ays-quiz-category-selective-main-container .ays-quiz-category-selective-restart-bttn:hover, #ays-quiz-container-13 .ays-quiz-category-selective-submit-bttn:hover { background: none; box-shadow: 0 0 0 2px #000000; background-color: #27AE60; } #ays-quiz-container-13 .ays_restart_button { color: #000000; } #ays-quiz-container-13 .ays_restart_button_p, #ays-quiz-container-13 .ays_buttons_div { justify-content: center; } #ays-quiz-container-13 .ays_finish.action-button{ margin: 10px 5px; } #ays-quiz-container-13 .ays-share-btn.ays-share-btn-branded { color: #fff; display: inline-block; } #ays-quiz-container-13 .ays_quiz_results .ays-field.checked_answer_div.correct_div input:checked+label { background-color: transparent; } /* Question answers */ #ays-quiz-container-13 .ays-field { border-color: #444; border-style: solid; border-width: 1px; box-shadow: none; } /* Answer maximum length of a text field */ #ays-quiz-container-13 .ays_quiz_question_text_message{ color: #000; text-align: left; font-size: 12px; } div#ays-quiz-container-13 div.ays_quiz_question_text_error_message { color: #ff0000; } #ays-quiz-container-13 .ays-quiz-answers .ays-field:hover{ opacity: 1; } #ays-quiz-container-13 #ays_finish_quiz_13 .ays-field { margin-bottom: 10px; } #ays-quiz-container-13 #ays_finish_quiz_13 .ays-field.ays_grid_view_item { width: calc(50% - 5px); } #ays-quiz-container-13 #ays_finish_quiz_13 .ays-field.ays_grid_view_item:nth-child(odd) { margin-right: 5px; } #ays-quiz-container-13 #ays_finish_quiz_13 .ays-field input:checked+label:before { border-color: #27AE60; background: #27AE60; background-clip: content-box; } #ays-quiz-container-13 .ays-quiz-answers div.ays-text-right-answer { color: #000; } /* Questions answer image */ #ays-quiz-container-13 .ays-answer-image { width:50%; } /* Questions answer right/wrong icons */ #ays-quiz-container-13 .ays-field input~label.answered.correct:after{ content: url('https://gogoacademy.net/wp-content/plugins/quiz-maker/public/images/correct.png'); } #ays-quiz-container-13 .ays-field input~label.answered.wrong:after{ content: url('https://gogoacademy.net/wp-content/plugins/quiz-maker/public/images/wrong.png'); } /* Dropdown questions */ #ays-quiz-container-13 #ays_finish_quiz_13 .ays-field .select2-container--default .select2-selection--single { border-bottom: 2px solid #27AE60; background-color: #27AE60; } #ays-quiz-container-13 .ays-field .select2-container--default .select2-selection--single .select2-selection__placeholder, #ays-quiz-container-13 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered, #ays-quiz-container-13 .ays-field .select2-container--default .select2-selection--single .select2-selection__arrow { color: #ffffff; } #ays-quiz-container-13 .select2-container--default .select2-search--dropdown .select2-search__field:focus, #ays-quiz-container-13 .select2-container--default .select2-search--dropdown .select2-search__field { outline: unset; padding: 0.75rem; } #ays-quiz-container-13 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered, #ays-quiz-container-13 .select2-container--default .select2-results__option--highlighted[aria-selected] { background-color: #27AE60; } #ays-quiz-container-13 .ays-field .select2-container--default, #ays-quiz-container-13 .ays-field .select2-container--default .selection, #ays-quiz-container-13 .ays-field .select2-container--default .dropdown-wrapper, #ays-quiz-container-13 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered, #ays-quiz-container-13 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered .select2-selection__placeholder, #ays-quiz-container-13 .ays-field .select2-container--default .select2-selection--single .select2-selection__arrow, #ays-quiz-container-13 .ays-field .select2-container--default .select2-selection--single .select2-selection__arrow b[role='presentation'] { font-size: 16px !important; } #ays-quiz-container-13 .select2-container--default .select2-results__option { padding: 6px; } /* Dropdown questions scroll bar */ #ays-quiz-container-13 .select2-results__options::-webkit-scrollbar { width: 7px; } #ays-quiz-container-13 .select2-results__options::-webkit-scrollbar-track { background-color: rgba(255,255,255,0.35); } #ays-quiz-container-13 .select2-results__options::-webkit-scrollbar-thumb { transition: .3s ease-in-out; background-color: rgba(0,0,0,0.55); } #ays-quiz-container-13 .select2-results__options::-webkit-scrollbar-thumb:hover { transition: .3s ease-in-out; background-color: rgba(0,0,0,0.85); } /* Audio / Video */ #ays-quiz-container-13 .mejs-container .mejs-time{ box-sizing: unset; } #ays-quiz-container-13 .mejs-container .mejs-time-rail { padding-top: 15px; } #ays-quiz-container-13 .mejs-container .mejs-mediaelement video { margin: 0; } /* Limitation */ #ays-quiz-container-13 .ays-quiz-limitation-count-of-takers { padding: 50px; } #ays-quiz-container-13 div.ays-quiz-results-toggle-block span.ays-show-res-toggle.ays-res-toggle-show, #ays-quiz-container-13 div.ays-quiz-results-toggle-block span.ays-show-res-toggle.ays-res-toggle-hide{ color: #000; } #ays-quiz-container-13 div.ays-quiz-results-toggle-block input:checked + label.ays_switch_toggle { border: 1px solid #000; } #ays-quiz-container-13 div.ays-quiz-results-toggle-block input:checked + label.ays_switch_toggle { border: 1px solid #000; } #ays-quiz-container-13 div.ays-quiz-results-toggle-block input:checked + label.ays_switch_toggle:after{ background: #000; } #ays-quiz-container-13.ays_quiz_elegant_dark div.ays-quiz-results-toggle-block input:checked + label.ays_switch_toggle:after, #ays-quiz-container-13.ays_quiz_rect_dark div.ays-quiz-results-toggle-block input:checked + label.ays_switch_toggle:after{ background: #000; } /* Hestia theme (Version: 3.0.16) | Start */ #ays-quiz-container-13 .mejs-container .mejs-inner .mejs-controls .mejs-button > button:hover, #ays-quiz-container-13 .mejs-container .mejs-inner .mejs-controls .mejs-button > button { box-shadow: unset; background-color: transparent; } #ays-quiz-container-13 .mejs-container .mejs-inner .mejs-controls .mejs-button > button { margin: 10px 6px; } /* Hestia theme (Version: 3.0.16) | End */ /* Go theme (Version: 1.4.3) | Start */ #ays-quiz-container-13 label[for^='ays-answer']:before, #ays-quiz-container-13 label[for^='ays-answer']:before { -webkit-mask-image: unset; mask-image: unset; } #ays-quiz-container-13.ays_quiz_classic_light .ays-field input:checked+label.answered.correct:before, #ays-quiz-container-13.ays_quiz_classic_dark .ays-field input:checked+label.answered.correct:before { background-color: #27AE60 !important; } /* Go theme (Version: 1.4.3) | End */ #ays-quiz-container-13 .ays_quiz_results fieldset.ays_fieldset .ays_quiz_question .wp-video { width: 100% !important; max-width: 100%; } /* Classic Dark / Classic Light */ /* Dropdown questions right/wrong styles */ #ays-quiz-container-13.ays_quiz_classic_dark .correct_div, #ays-quiz-container-13.ays_quiz_classic_light .correct_div{ border-color:green !important; opacity: 1 !important; background-color: rgba(39,174,96,0.4) !important; } #ays-quiz-container-13.ays_quiz_classic_dark .correct_div .selected-field, #ays-quiz-container-13.ays_quiz_classic_light .correct_div .selected-field { padding: 0px 10px 0px 10px; color: green !important; } #ays-quiz-container-13.ays_quiz_classic_dark .wrong_div, #ays-quiz-container-13.ays_quiz_classic_light .wrong_div{ border-color:red !important; opacity: 1 !important; background-color: rgba(243,134,129,0.4) !important; } #ays-quiz-container-13.ays_quiz_classic_dark .ays-field, #ays-quiz-container-13.ays_quiz_classic_light .ays-field { text-align: left; /*margin-bottom: 10px;*/ padding: 0; transition: .3s ease-in-out; } #ays-quiz-container-13 .ays-quiz-close-full-screen { fill: #000; } #ays-quiz-container-13 .ays-quiz-open-full-screen { fill: #000; } #ays-quiz-container-13 .ays_quiz_login_form p{ color: #000; } @media screen and (max-width: 768px){ #ays-quiz-container-13{ max-width: 100%; } #ays-quiz-container-13 .ays_quiz_question p { font-size: 16px; } #ays-quiz-container-13 .select2-container, #ays-quiz-container-13 .ays-field * { font-size: 15px !important; } div#ays-quiz-container-13 input#ays-submit, div#ays-quiz-container-13 #ays_finish_quiz_13 .action-button, div#ays-quiz-container-13 #ays_finish_quiz_13 .action-button.ays_restart_button, #ays-quiz-container-13 + .ays-quiz-category-selective-main-container .ays-quiz-category-selective-restart-bttn, #ays-quiz-container-13 .ays-quiz-category-selective-submit-bttn { font-size: 17px; } /* Quiz title / mobile font size */ div#ays-quiz-container-13 .ays-fs-title { font-size: 21px; } /* Question explanation / mobile font size */ #ays-quiz-container-13 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Quiz 1: chapter3:Chemical equilibrium

written by gogorabei | June 9, 2023

Created on January 21, 2023 By

gogorabei

chapter3:chemical Equilibrium Quiz1

1 / 30

(1) Equilibrium system is described as dynamic because

(a) the reaction occurs in a very short time.

(b) the mass of the reactants decrease continuously.

(d.) the rate of forward reaction equals the rate of backward reaction.

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(2) The reaction of hydrochloric acid with magnesium is a complete reaction because

(a) it occurs at high temperature.

(b) it occurs at high pressure.

(c.) the recombination of hydrogen gas with magnesium chloride is difficult.

(d) The reactants and products are in equilibrium state.

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(3) --------- is a one of the instantaneous reactions.

(a) Acetic acid with ethyl alcohol

(b) Saponification

(c.) Silver nitrate with sodium chloride

(d) The rusting of iron

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(4)---------- is a one of the comparatively slow reactions.

(a) Silver nitrate with sodium chloride

(b.) The reaction between plants oil and caustic soda

(d) Sodium hydroxide with hydrochloric acid

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(5) The solution of the reaction of acetic acid with ethyl alcohol turns litmus paper red because

(a) ethyl alcohol has no effect on litmus paper.

(b) the reaction is a complete reaction which proceeds towards the formation of the product.

(c.) the reaction is a reversible reaction which proceeds in both directions so acetic a is found in the reaction medium.

(d) both (b) and (c).

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(a)

(b.)

(c)

(d)

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(7) The opposite figure represents -----

(a.) the chemical reaction rate of reactants.

(b) the mass action law.

c) Le Chatelier's principle.

(d) equilibrium constant Kc

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20) The Kc of the reaction:

SnO₂+2CO_(g) ↔ Sn_(s)+2CO_2(g)

Is -------------------------

(a) Kc= [CO₂] / [CO]

(b.) Kc= [CO₂]² / [CO]²

(c) Kc= [Sn].[CO₂]² / [SnO2][CO2]²

(d) Kc= [Sn] [CO2]² / [CO]²

(a)

(b.)

(c)

(d)

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9 / 30

(19) The rate of a chemical reaction:

Zn_(s) + 2HCl_(g) ↔ ZnCl_2(aq)+H_2(g)

is measured by changing in-------------------

(a) the mass of Zn

(b) the solubility of HCI

(c.). the concentration of Cl-

(d) the colour of solution.

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10 / 30

(18) When temperature of the following reaction:

H₂+I2 ↔ 2HI

is raised, the increasing in K1, is less than that of K,2. So, the equilibrium constant Kc ------------

(a.) decreases by heating.

(b) increases by heating.

(d) both (b) and (c).

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(17) From the Kc value of the reaction:

2SO3(g) ↔ 2SO2(g)+O2 , Kc=1.2x10^-4

we can conclude that -----------

(a) decomposition of SO3 is the predominant.

(b) the concentration of SO3 is very small if it is compared with O2 and SO2

(d.). the backward reaction is the predominant reaction.

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12 / 30

(16) From the Kc value for the reaction:

H2(g) + Cl2(g) ↔ 2HCl(g) .Kc=4.4 × 10³²

we can conclude that ------

(a) the backward reaction is the predominant reaction.

(b.) the concentration of HCI gas is very high if it is compared with that of hydrogen and chlorine gases.

(d) no correct answer.

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(11) ------- established a law expressing the relationship between the rate of the chemical reaction and concentration of the reactants.

(a) Heisenberg

(b) Le Chatelier

(c). Waage and Guldberg

(d) Ostwald

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(12) The chemical reaction is in equilibrium when --------

(a) K1 = K2

(b) r₁ =r₂ .

(d) K1/K2 = r1/r2

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15 / 30

(13) In the following equilibrium reaction:

FeCl3(aq) +3NH SCN(aq) ↔ Fe(SCN)3(aq) + 3NH4Cl(aq)

The rate of reversible reaction is expressed by --------

(a) r1=[FeCl3,][NH4SCN]³

(b)r2 α [Fe(SCN)3]3 [NH4Cl]

(c.) r₂ = K₂ [Fe(SCN)3] [NH4]3

(d)r1= K1[FeCl3] [NH4SCN]³

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(14) K1/K2 for an equilibrium reaction is known as K

(a.) the equilibrium constant K

(b) the equilibrium point.

(d) neutralization point

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(15) When the value of equilibrium constant is high, it means that ---------

(a) the multiplication product of the partial concentrations of the products is relatively small.

(b) the forward reaction is the predominant reaction.

(d) the pressure has no effect on the reaction equilibrium.

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(8) Each of the following affects the chemical equilibrium except the --------- if the volumes of reactants and products are different.

(a) concentration of reactants

(b) pressure

(c.) catalyst

(d) temperature

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(9) The reaction:

N2(g) + 3H2(g) = 2NH3(g) (N=14, H=1]

reaches the equilibrium state when are present in a closed flask. (at S.T.P)

(a) one mole of nitrogen gas with 6 moles of hydrogen gas

(b) 28 g of nitrogen gas with 6 g of hydrogen gas

(d). (b) and (c)

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20 / 30

(10) In the reaction: Vegetable oil +H2(g) in presence of Ni /Δ → Margarine (artificial fat)

the nickel used is preferred to be in the form of ......

(a) liquid.

(b) gas

(c). divided solid.

(d) large solid pieces.

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(29) On increasing the reactants concentrations of a reaction under equilibrium, a shift in the direction of --------

takes place.

(a) decreasing the number of reactants molecules

(b) increasing the number of products molecules

(c.) (a) and (b)

(d) no correct answer

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(21) The concentration of reactants equals the concentration of products at the equilibrium reaction reaction --------

a)Na₂O_4(g) ↔ 2NO_2(g) Kc=0.71

b)H⁺_(aq) +OH^-_(aq) ↔ H₂O_(l) Kc= 1x 10 ¹⁴

c)CO_2(g) +H_2(g) ↔ CO_(g)+ H₂O_{(v) Kc=0.297}

d.)SnO_2(s)+2H_2(g) ↔ Sn_(s)+2H₂O_(v) Kc=1

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(28) On increasing the pressure on a gaseous reaction under equilibrium, a shift in the direction of -------------takes place.

(a) increasing the density

(b.) decreasing the volume

(d) increasing the concentration of the reactants

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(27) by increasing the reaction temperature 10°C

(a) The rate of the chemical reaction decreases to its half

(b.) The rate of the chemical reaction is doubled

(d) The time required to complete the chemical reaction is doubled

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26 / 30

(26) The Kc value of the reaction changes when -----

(a) catalyst is added.

(b.) temperature is changed.

(d) vessel volume is changed.

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27 / 30

(25) The concentration of gases is preferable to expressed by

(a) the molar concentration.

(b) the normality.

(d.) the partial pressure.

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28 / 30

(24) The orange colour turns yellow on adding -------- to the follwing reaction:

2CrO₄^2-_(aq)+ 2H₃O⁺_(aq) ↔ Cr2O₇^2-+ 3H₂O_(l)

Yellow orange

(a) KNO₃ (b.) NaOH

(c)NH₄NO₃ (d)CH₃COOH

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29 / 30

(23) The Kc value equals Kp for the reaction

(a) PCl_5(g) ↔ PCl_3(g) +Cl_2(g)

(b)2SO_2(g)+O_2(g) ↔ 2SO_3(g)

(c.) H_2(g) + I_2(g) ↔ 2HI_(g)

(d) N_2(g) +3H_2(g) ↔ 2NH_3(g)

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30 / 30

(22) Which of the following changes increases the kinetic energy of the reactant molecules ? -------------------

(a) The decreasing of concentration

(b.) The increasing of temperature.

(c) The increasing of surface area.

(d) The increasing of concentration.

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The average score is 34%

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rgb(0,0,0); text-align: center; } /* Quiz textarea height */ #ays-quiz-container-12 textarea { height: 100px; min-height: 100px; } /* Quiz rate and passed users count */ #ays-quiz-container-12 .ays_quizn_ancnoxneri_qanak, #ays-quiz-container-12 .ays_quiz_rete_avg { color:#fff !important; background-color:#000; } #ays-quiz-container-12 .ays-questions-container > .ays_quizn_ancnoxneri_qanak { padding: 5px 20px; } #ays-quiz-container-12 div.for_quiz_rate.ui.star.rating .icon { color: rgba(0,0,0,0.35); } #ays-quiz-container-12 .ays_quiz_rete_avg div.for_quiz_rate_avg.ui.star.rating .icon { color: rgba(255,255,255,0.5); } #ays-quiz-container-12 .ays_quiz_rete .ays-quiz-rate-link-box .ays-quiz-rate-link { color: #000; } /* Loaders */ #ays-quiz-container-12 div.lds-spinner, #ays-quiz-container-12 div.lds-spinner2 { color: #000; } #ays-quiz-container-12 div.lds-spinner div:after, #ays-quiz-container-12 div.lds-spinner2 div:after { background-color: #000; } #ays-quiz-container-12 .lds-circle, #ays-quiz-container-12 .lds-facebook div, #ays-quiz-container-12 .lds-ellipsis div{ background: #000; } #ays-quiz-container-12 .lds-ripple div{ border-color: #000; } #ays-quiz-container-12 .lds-dual-ring::after, #ays-quiz-container-12 .lds-hourglass::after{ border-color: #000 transparent #000 transparent; } /* Stars */ #ays-quiz-container-12 .ui.rating .icon, #ays-quiz-container-12 .ui.rating .icon:before { } /* Progress bars */ #ays-quiz-container-12 #ays_finish_quiz_12 .ays-progress { border-color: rgba(0,0,0,0.8); } #ays-quiz-container-12 #ays_finish_quiz_12 .ays-progress-bg { background-color: rgba(0,0,0,0.3); } #ays-quiz-container-12 .ays-progress-value { color: #000; text-align: center; } #ays-quiz-container-12 .ays-progress-bar { background-color: #27AE60; } #ays-quiz-container-12 .ays-question-counter .ays-live-bar-wrap { direction:ltr !important; } #ays-quiz-container-12 .ays-live-bar-fill{ color: #000; border-bottom: 2px solid rgba(0,0,0,0.8); text-shadow: 0px 0px 5px #fff; } #ays-quiz-container-12 .ays-live-bar-fill.ays-live-fourth, #ays-quiz-container-12 .ays-live-bar-fill.ays-live-third, #ays-quiz-container-12 .ays-live-bar-fill.ays-live-second { text-shadow: unset; } #ays-quiz-container-12 .ays-live-bar-percent{ display:none; } #ays-quiz-container-12 #ays_finish_quiz_12 .ays_average { text-align: center; } /* Music, Sound */ #ays-quiz-container-12 .ays_music_sound { color:rgb(0,0,0); } /* Dropdown questions scroll bar */ #ays-quiz-container-12 blockquote { border-left-color: #000 !important; } /* Quiz Password */ #ays-quiz-container-12 .ays-start-page > input[id^='ays_quiz_password_val_'], #ays-quiz-container-12 .ays-quiz-password-toggle-visibility-box { width: 100%; } /* Question hint */ #ays-quiz-container-12 .ays_question_hint_container .ays_question_hint_text { background-color:#fff; box-shadow: 0 0 15px 3px rgba(0,0,0,0.6); max-width: 270px; } #ays-quiz-container-12 .ays_question_hint_container .ays_question_hint_text p { max-width: unset; } #ays-quiz-container-12 .ays_questions_hint_max_width_class { max-width: 80%; } /* Information form */ #ays-quiz-container-12 .ays-form-title{ color:rgb(0,0,0); } /* Quiz timer */ #ays-quiz-container-12 div.ays-quiz-redirection-timer, #ays-quiz-container-12 div.ays-quiz-timer{ color: #000; text-align: center; } #ays-quiz-container-12 div.ays-quiz-timer.ays-quiz-message-before-timer:before { font-weight: 500; } /* Quiz title / transformation */ #ays-quiz-container-12 .ays-fs-title{ text-transform: uppercase; font-size: 21px; text-align: center; text-shadow: none; } /* Quiz buttons */ #ays-quiz-container-12 .ays_arrow { color:#000000!important; } #ays-quiz-container-12 input#ays-submit, #ays-quiz-container-12 #ays_finish_quiz_12 .action-button, div#ays-quiz-container-12 #ays_finish_quiz_12 .action-button.ays_restart_button, #ays-quiz-container-12 + .ays-quiz-category-selective-main-container .ays-quiz-category-selective-restart-bttn, #ays-quiz-container-12 .ays-quiz-category-selective-submit-bttn { background: none; background-color: #27AE60; color:#000000; font-size: 17px; padding: 10px 20px; border-radius: 3px; height: auto; letter-spacing: 0; box-shadow: unset; } #ays-quiz-container-12 input#ays-submit, #ays-quiz-container-12 #ays_finish_quiz_12 input.action-button, #ays-quiz-container-12 + .ays-quiz-category-selective-main-container .ays-quiz-category-selective-restart-bttn, #ays-quiz-container-12 .ays-quiz-category-selective-submit-bttn { } #ays-quiz-container-12 #ays_finish_quiz_12 .action-button.ays_check_answer { padding: 5px 10px; font-size: 17px !important; } #ays-quiz-container-12 #ays_finish_quiz_12 .action-button.ays_restart_button { white-space: nowrap; padding: 5px 10px; white-space: normal; } #ays-quiz-container-12 input#ays-submit:hover, #ays-quiz-container-12 input#ays-submit:focus, #ays-quiz-container-12 #ays_finish_quiz_12 .action-button:hover, #ays-quiz-container-12 #ays_finish_quiz_12 .action-button:focus, #ays-quiz-container-12 + .ays-quiz-category-selective-main-container .ays-quiz-category-selective-restart-bttn:hover, #ays-quiz-container-12 .ays-quiz-category-selective-submit-bttn:hover { background: none; box-shadow: 0 0 0 2px #000000; background-color: #27AE60; } #ays-quiz-container-12 .ays_restart_button { color: #000000; } #ays-quiz-container-12 .ays_restart_button_p, #ays-quiz-container-12 .ays_buttons_div { justify-content: center; } #ays-quiz-container-12 .ays_finish.action-button{ margin: 10px 5px; } #ays-quiz-container-12 .ays-share-btn.ays-share-btn-branded { color: #fff; display: inline-block; } #ays-quiz-container-12 .ays_quiz_results .ays-field.checked_answer_div.correct_div input:checked+label { background-color: transparent; } /* Question answers */ #ays-quiz-container-12 .ays-field { border-color: #444; border-style: solid; border-width: 1px; box-shadow: none; } /* Answer maximum length of a text field */ #ays-quiz-container-12 .ays_quiz_question_text_message{ color: #000; text-align: left; font-size: 12px; } div#ays-quiz-container-12 div.ays_quiz_question_text_error_message { color: #ff0000; } #ays-quiz-container-12 .ays-quiz-answers .ays-field:hover{ opacity: 1; } #ays-quiz-container-12 #ays_finish_quiz_12 .ays-field { margin-bottom: 10px; } #ays-quiz-container-12 #ays_finish_quiz_12 .ays-field.ays_grid_view_item { width: calc(50% - 5px); } #ays-quiz-container-12 #ays_finish_quiz_12 .ays-field.ays_grid_view_item:nth-child(odd) { margin-right: 5px; } #ays-quiz-container-12 #ays_finish_quiz_12 .ays-field input:checked+label:before { border-color: #27AE60; background: #27AE60; background-clip: content-box; } #ays-quiz-container-12 .ays-quiz-answers div.ays-text-right-answer { color: #000; } /* Questions answer image */ #ays-quiz-container-12 .ays-answer-image { width:50%; } /* Questions answer right/wrong icons */ #ays-quiz-container-12 .ays-field input~label.answered.correct:after{ content: url('https://gogoacademy.net/wp-content/plugins/quiz-maker/public/images/correct.png'); } #ays-quiz-container-12 .ays-field input~label.answered.wrong:after{ content: url('https://gogoacademy.net/wp-content/plugins/quiz-maker/public/images/wrong.png'); } /* Dropdown questions */ #ays-quiz-container-12 #ays_finish_quiz_12 .ays-field .select2-container--default .select2-selection--single { border-bottom: 2px solid #27AE60; background-color: #27AE60; } #ays-quiz-container-12 .ays-field .select2-container--default .select2-selection--single .select2-selection__placeholder, #ays-quiz-container-12 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered, #ays-quiz-container-12 .ays-field .select2-container--default .select2-selection--single .select2-selection__arrow { color: #ffffff; } #ays-quiz-container-12 .select2-container--default .select2-search--dropdown .select2-search__field:focus, #ays-quiz-container-12 .select2-container--default .select2-search--dropdown .select2-search__field { outline: unset; padding: 0.75rem; } #ays-quiz-container-12 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered, #ays-quiz-container-12 .select2-container--default .select2-results__option--highlighted[aria-selected] { background-color: #27AE60; } #ays-quiz-container-12 .ays-field .select2-container--default, #ays-quiz-container-12 .ays-field .select2-container--default .selection, #ays-quiz-container-12 .ays-field .select2-container--default .dropdown-wrapper, #ays-quiz-container-12 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered, #ays-quiz-container-12 .ays-field .select2-container--default .select2-selection--single .select2-selection__rendered .select2-selection__placeholder, #ays-quiz-container-12 .ays-field .select2-container--default .select2-selection--single .select2-selection__arrow, #ays-quiz-container-12 .ays-field .select2-container--default .select2-selection--single .select2-selection__arrow b[role='presentation'] { font-size: 16px !important; } #ays-quiz-container-12 .select2-container--default .select2-results__option { padding: 6px; } /* Dropdown questions scroll bar */ #ays-quiz-container-12 .select2-results__options::-webkit-scrollbar { width: 7px; } #ays-quiz-container-12 .select2-results__options::-webkit-scrollbar-track { background-color: rgba(255,255,255,0.35); } #ays-quiz-container-12 .select2-results__options::-webkit-scrollbar-thumb { transition: .3s ease-in-out; background-color: rgba(0,0,0,0.55); } #ays-quiz-container-12 .select2-results__options::-webkit-scrollbar-thumb:hover { transition: .3s ease-in-out; background-color: rgba(0,0,0,0.85); } /* Audio / Video */ #ays-quiz-container-12 .mejs-container .mejs-time{ box-sizing: unset; } #ays-quiz-container-12 .mejs-container .mejs-time-rail { padding-top: 15px; } #ays-quiz-container-12 .mejs-container .mejs-mediaelement video { margin: 0; } /* Limitation */ #ays-quiz-container-12 .ays-quiz-limitation-count-of-takers { padding: 50px; } #ays-quiz-container-12 div.ays-quiz-results-toggle-block span.ays-show-res-toggle.ays-res-toggle-show, #ays-quiz-container-12 div.ays-quiz-results-toggle-block span.ays-show-res-toggle.ays-res-toggle-hide{ color: #000; } #ays-quiz-container-12 div.ays-quiz-results-toggle-block input:checked + label.ays_switch_toggle { border: 1px solid #000; } #ays-quiz-container-12 div.ays-quiz-results-toggle-block input:checked + label.ays_switch_toggle { border: 1px solid #000; } #ays-quiz-container-12 div.ays-quiz-results-toggle-block input:checked + label.ays_switch_toggle:after{ background: #000; } #ays-quiz-container-12.ays_quiz_elegant_dark div.ays-quiz-results-toggle-block input:checked + label.ays_switch_toggle:after, #ays-quiz-container-12.ays_quiz_rect_dark div.ays-quiz-results-toggle-block input:checked + label.ays_switch_toggle:after{ background: #000; } /* Hestia theme (Version: 3.0.16) | Start */ #ays-quiz-container-12 .mejs-container .mejs-inner .mejs-controls .mejs-button > button:hover, #ays-quiz-container-12 .mejs-container .mejs-inner .mejs-controls .mejs-button > button { box-shadow: unset; background-color: transparent; } #ays-quiz-container-12 .mejs-container .mejs-inner .mejs-controls .mejs-button > button { margin: 10px 6px; } /* Hestia theme (Version: 3.0.16) | End */ /* Go theme (Version: 1.4.3) | Start */ #ays-quiz-container-12 label[for^='ays-answer']:before, #ays-quiz-container-12 label[for^='ays-answer']:before { -webkit-mask-image: unset; mask-image: unset; } #ays-quiz-container-12.ays_quiz_classic_light .ays-field input:checked+label.answered.correct:before, #ays-quiz-container-12.ays_quiz_classic_dark .ays-field input:checked+label.answered.correct:before { background-color: #27AE60 !important; } /* Go theme (Version: 1.4.3) | End */ #ays-quiz-container-12 .ays_quiz_results fieldset.ays_fieldset .ays_quiz_question .wp-video { width: 100% !important; max-width: 100%; } /* Classic Dark / Classic Light */ /* Dropdown questions right/wrong styles */ #ays-quiz-container-12.ays_quiz_classic_dark .correct_div, #ays-quiz-container-12.ays_quiz_classic_light .correct_div{ border-color:green !important; opacity: 1 !important; background-color: rgba(39,174,96,0.4) !important; } #ays-quiz-container-12.ays_quiz_classic_dark .correct_div .selected-field, #ays-quiz-container-12.ays_quiz_classic_light .correct_div .selected-field { padding: 0px 10px 0px 10px; color: green !important; } #ays-quiz-container-12.ays_quiz_classic_dark .wrong_div, #ays-quiz-container-12.ays_quiz_classic_light .wrong_div{ border-color:red !important; opacity: 1 !important; background-color: rgba(243,134,129,0.4) !important; } #ays-quiz-container-12.ays_quiz_classic_dark .ays-field, #ays-quiz-container-12.ays_quiz_classic_light .ays-field { text-align: left; /*margin-bottom: 10px;*/ padding: 0; transition: .3s ease-in-out; } #ays-quiz-container-12 .ays-quiz-close-full-screen { fill: #000; } #ays-quiz-container-12 .ays-quiz-open-full-screen { fill: #000; } #ays-quiz-container-12 .ays_quiz_login_form p{ color: #000; } @media screen and (max-width: 768px){ #ays-quiz-container-12{ max-width: 100%; } #ays-quiz-container-12 .ays_quiz_question p { font-size: 16px; } #ays-quiz-container-12 .select2-container, #ays-quiz-container-12 .ays-field * { font-size: 15px !important; } div#ays-quiz-container-12 input#ays-submit, div#ays-quiz-container-12 #ays_finish_quiz_12 .action-button, div#ays-quiz-container-12 #ays_finish_quiz_12 .action-button.ays_restart_button, #ays-quiz-container-12 + .ays-quiz-category-selective-main-container .ays-quiz-category-selective-restart-bttn, #ays-quiz-container-12 .ays-quiz-category-selective-submit-bttn { font-size: 17px; } /* Quiz title / mobile font size */ div#ays-quiz-container-12 .ays-fs-title { font-size: 21px; } /* Question explanation / mobile font size */ #ays-quiz-container-12 .ays_questtion_explanation p { font-size:16px; } /* Wrong answers / mobile font size */ #ays-quiz-container-12 .wrong_answer_text p { font-size:16px; } /* Right answers / mobile font size */ #ays-quiz-container-12 .right_answer_text p { font-size:16px; } /* Note text / mobile font size */ #ays-quiz-container-12 .ays-quiz-question-note-message-box p { font-size:14px; } } /* Custom css styles */ /* RTL direction styles */ #ays-quiz-container-12 p { margin: 0.625em; } #ays-quiz-container-12 .ays-field.checked_answer_div input:checked+label { background-color: rgba(39,174,96,0.6); } #ays-quiz-container-12.ays_quiz_classic_light .enable_correction .ays-field.checked_answer_div input:checked+label, #ays-quiz-container-12.ays_quiz_classic_dark .enable_correction .ays-field.checked_answer_div input:checked+label { background-color: transparent; } #ays-quiz-container-12 .ays-field.checked_answer_div input:checked+label:hover { background-color: rgba(39,174,96,0.8); } #ays-quiz-container-12 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Equilibrium Quiz1","description":"","quiz_image":"","quiz_category_id":"4","question_ids":"231,232,233,234,235,236,237,250,249,248,247,246,241,242,243,244,245,238,239,240,260,259,251,258,257,256,255,254,253,252","ordering":"12","published":"1","intervals":null,"quiz_url":null,"quiz_animation_top":100,"quiz_enable_animation_top":"on"}';

Quiz1:oraganic compounds and classification of Hydrocarbons

written by gogorabei | June 9, 2023

Created on January 15, 2023 By

gogorabei

chapter5: Organic chemistry

organic compounds and classification of Hydrocarbons

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Category: chapter1 Transition Elements

(5) The organic compound that was obtained on heating aqueous solutions of ammonium chloride and silver cyanate.

b)sliver cyanate

d)Urea

c)Ammonium cyanate

a)Ammonia

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Category: chapter1 Transition Elements

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Category: chapter1 Transition Elements

(15) The unsaturated open chain aliphatic hydrocarbons, which are characterized by the presence of a double bond at least in the carbon chain.

d)a and b

a)Alkenes

b)Alkanes

c)a)Alkynes

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Category: chapter1 Transition Elements

25) The scientist who destroyed the vital force theory is.....

(d) Mosley.

(a) Wohler.

(b) Brezelius.

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Category: chapter1 Transition Elements

(8) The formula which indicates the kind and number of the atoms of each element in

the compound.

b)a and c

d)empirical formula

a)molecular formula

c)structural formula

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Category: chapter1 Transition Elements

(14) The saturated cyclic aliphatic hydrocarbons.

c) cycloalkenes.

d) cycloalkynes.

c.)Cycloalkane

a)Alkanes

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Category: chapter1 Transition Elements

(13) The saturated open chain aliphatic hydrocarbons.

a)Alkenes

c)Alkanes

b)a)Alkynes

d)a and b

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Category: chapter1 Transition Elements

(6) The basic element in all the organic compounds.

c)O

a)H

b)N

d)Carbon

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Category: chapter1 Transition Elements

23)Classify the following compounds into : (alkanes – alkenes - alkynes):

(1) C₃H₈ (2) C₇H₁₂ (3) C₆H₁₂ (4) C₄H₁₀ (5) C₄₀H_{82 (6) C5H12}

c)a)Alkane : (1-4-5-6 )-Alkynes :(3) -Alkyne:(2)

a)Alkenes : (1-4-5-6 )-Alkenes :(3) -Alkyne:(2)

d)Alkene : (1-4-5-6 )-Alkanes :(3) -Alkyne:(2)

a)Alkane : (1-4-5-6 )-Alkenes :(3) -Alkyne:(2)

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Category: chapter1 Transition Elements

(10) It is a phenomenon that many organic compounds have the same molecular formula but differ in structural formula.

b)polymorization

d)b and c are correct

a)The isomerism

c)Condensation

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Category: chapter1 Transition Elements

(1) The compounds which have been thought that they are extracted from plants and animals only.

d)no answers are correct

b)inorganic compounds

a)organic compounds

c) a and b

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Category: chapter1 Transition Elements

(12) The organic compounds which consist of carbon and hydrogen only.

c)A and b are correct

A)Hydrocarbons

B)A)Hydrocarbon derivatives

d)there are no correct answrs

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Category: chapter1 Transition Elements

24)The scientist who classified the compounds into organic and inorganic compounds

(d) Mosley.

(a) Wohler.

(b) Brezelius.

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Category: chapter1 Transition Elements

26) The carbon atoms of thiophene are bonded with sulphur in the form of compound.

(d) homocyclic

(b) branched chain

(a) straight chain

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Category: chapter1 Transition Elements

(11) The substance which added to the organic compound to detect the presence of carbon and hydrogen.

c)copper sulphate

d) a and b are correct

b)CuO

a)copper oxide

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Category: chapter1 Transition Elements

(3) A theory which considered that organic compounds are formed in the cells of living organisms only.

d) A and b

b)The vital energy theory

a)The vital force theory

c)The work force theory

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Category: chapter1 Transition Elements

(28) The organic chemistry focused on the study of carbon element with exception of

(d) all the previous.

(a) carbon oxides.

(b) carbonate and bicarbonate salts.

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Category: chapter1 Transition Elements

(16) The unsaturated open chain aliphatic hydrocarbons, which are characterized by the presence of a triple bond at least in the carbon chain.

a)alkanes

c)Alkynes

b)Alkenes

d) a and c

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Category: chapter1 Transition Elements

(21) The organic compounds in which all the corners of the ring have carbon atoms only

a)The homocyclic compounds

d)no correct answers

b)heterocyclic compounds

c)a and b

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Category: chapter1 Transition Elements

(27) All the following compounds are organic compounds except

(d) sodium carbonate.

(a) methane.

(b) ethene.

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Category: chapter1 Transition Elements

(b) branched chain.

(d) heterocyclic.

(a) straight chain.

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Category: chapter1 Transition Elements

(4) The first organic compound that was prepared in Lab. not in the living cells

a)ammonium chloride

c)ammonium cyanate

d)silver cyanate

b)Urea

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Category: chapter1 Transition Elements

(20) Unsaturated aliphatic hydrocarbons, their general molecular formula are: C_nH_2n-2

b)Alkene

d) b and c

c)alkynes

a)alkane

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Category: chapter1 Transition Elements

(26) The organic compound which is obtained on heating ammonium cyanate is ------

(d) ammonium carbonate.

b) urea.

(a) ammonia.

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Category: chapter1 Transition Elements

(19) Unsaturated aliphatic hydrocarbons, their general molecular formula are : C_nH_2n

a)Alkenes

d)a and c are correct

b)Alkanes

c)cyclic alkanes

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Category: chapter1 Transition Elements

(9) The formula which indicates the type of linkage between the atoms by the covalent bonds.

b)structural formula

d)a and b are correct

a)molecular formula

c)empirical formula

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Category: chapter1 Transition Elements

(18) Cyclic hydrocarbons, their general molecular formula are CnH2n+2

c)Alkane

d) a and b

b)alkynes

a)Alkenes

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Category: chapter1 Transition Elements

(7) The branch of Chemistry that focused on the study of carbon element with exception of carbon oxides, carbonate and cyanide salts.

b)bichemistry

d)geochemistry

a)Analytical chemistry

c)organic chemistry

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Category: chapter1 Transition Elements

(22) The organic compounds in which the corners of the ring have carbon atoms and other atoms of different elements.

d)no correct answer

c)a and b

b)Heterocyclic compound

a)Homocyclic compound

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Category: chapter5:organic chemistery

(42) Propyne (C2H4) is an example of ---------------

d)Aromatic hydrocarbon

(b) alkenes.

(a) alkanes

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Category: chapter5:organic chemistery

(31) Most of organic compounds soluble in ------

(b) polar solvents.

(a) water.

(d) (a), (b) and (c).

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Category: chapter5:organic chemistery

(33) Reactions between organic compounds are slow because they take place between..........

(d) similar atoms.

(b) molecules.

(a) ions.

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Category: chapter5:organic chemistery

(44) On burning an organic substance with copper oxide, ----------- are produced.

(b) H2O,CO

(d) CO2,CO

(a) CO2, H2O

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Category: chapter5:organic chemistery

(44) We can detect the presence of water by using ---------------

(d) ammonia.

(b) anhydrous sodium sulphate.

(a) iron II sulphate.

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Category: chapter5:organic chemistery

(40) The hydrocarbons with the molecular formula C_nH_2n+2 are

(a)cyclic alkane

b)Alkyne

c)alkane

(d) alkenes,

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Category: chapter5:organic chemistery

(46) The molecular formula of aromatic benzene is ----------

(b) C6H₁₂

(a) C6H6

(d) C6H5

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Category: chapter5:organic chemistery

(37) All organic compounds contain------ in their structure.

(a) carbon and nitrogen

(b) carbon and oxygen

(d) carbon and hydrogen

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Category: chapter5:organic chemistery

(10) The bonds in organic compounds are .......bonds.

(d) metallic

(b) ionic

(a) covalent

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Category: chapter5:organic chemistery

(36) The phenomenon that many organic compounds have the same molecular formula is called............

(a) polymerization

(b) dimerization

(d) structural formula.

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Category: chapter5:organic chemistery

(47) The molecular formula of naphthalene is....

(d.) C10H10

(b) C12H10

(a) C12H12

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Category: chapter5:organic chemistery

(40) Any combination of the following hydrocarbons represents the isomer to the another one ?

d)B,D

b)A,D

a)A,B

c)B,C

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Category: chapter5:organic chemistery

(35) The formula that shows the number and the type of atoms only in the molecule formula.

(b) a molecular

(a) a structural

(d) no correct answer

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Category: chapter5:organic chemistery

(41) The organic compounds with formula C₂H₄, is ------------ compound

(d) an unsaturated aliphatic

(a) a saturated aliphatic

(b) a saturated cyclic

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Category: chapter5:organic chemistery

(2) The compounds which are extracted from mineral sources in the Earth.

d)no answers are correct

c)a and b

a)organic compounds

b)inorganic compounds

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Category: chapter5:organic chemistery

(38) The compound with the structural formula: Follows a group of the compounds

whose general formula is

(a) C_2nH_5nO_n (c) C_nH_2n+2O₂

(b)C_nH_2nO₂(d) C_nH_2n-2O₂

(a) C2n H5n On

(d) Cn H2n-2 O2

(b)Cn H2n O2

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Category: chapter5:organic chemistery

30)The carbon atoms can combine with each other by............bonds.

(d) (a), (b) and (c)

(a) single

(b) double

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Category: chapter5:organic chemistery

(32) The boiling and melting points of organic compounds are

(b) high.

.(d)not limited

(a) intermediate.

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Category: chapter5:organic chemistery

(43) The molecular formula C₆H₁₂ is a formula of -------------

(d) (a) and (c).

(b) alkane only.

(a) alkene only.

(c)cyclohexane only.

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Category: chapter5:organic chemistery

(45) Benzene and naphthalene are examples of hydrocarbons.

(b) unsaturated aliphatic

(a) saturated aliphatic

(d.) unsaturated cyclic

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Category: chapter5:organic chemistery

(39) The corresponding two compounds are similar in-------- and differ in ------------

(d) functional group/molecular mass.

(c.) molecular formula / chemical reactions.

(b) functional group/molecular formula.

(a) molecular formula / molecular mass.

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Your score is

The average score is 32%

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الاختبار (1) عناصر السلسلة الانتقالية الأولى

written by gogorabei | June 9, 2023

QUIZ START

Quiz7:The properties of the First transition series

written by gogorabei | June 9, 2023

Quiz8:chapter1:The electronic configuration of The Transition Elements

written by gogorabei | June 9, 2023

QUIZ START

Quiz4:chapter one Transition elements

written by gogorabei | June 9, 2023

QUIZ START

Quiz1:chapter2 chemical analysis

written by gogorabei | June 9, 2023

Created on November 08, 2022 By

gogorabei

Quiz1:chapter2 chemical analysis (dil. HCl )group

chemical analysis , the types of chemical analysis ,qualitative

analysis and

analysis quantitative

1 / 31

chemical analysis is useful in etraction iron from its ores because it ….

a)determine Fe% in the ores

b)determine the type of harmful elements in the different ores

c)detrmine C% in the produced steel

d) All the previous

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2 / 31

Analysis of inorganic compounds included detection of ……

a)anions

b)cations

c.)a and b

d)functional group

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3 / 31

To identify chemical formula of a compound we should identify ……

a)types of elements ..

b)ratio of each elements

c)how these elements bonded together

d) All the previous

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4 / 31

To identify a substance by measuring its molar mass or melting point it should be …

a)solid substance

b)mixture of more salts

.c)pure substance

d)all the previous

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5 / 31

The most stable acid is ….

a)H2SO4.

b)HCl

c)H2CO3

d)HNO3

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6 / 31

7)The most stable acid is ….

a)H2SO4.

b)HCl

c)H2CO3

d)HNO3

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7 / 31

Dil. HCl can detect all the following except ….

a)sulphide

b).sulphate

c) thiosulphate

d)sulphite

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8 / 31

Anion (A) from dil. HCl groups ……

a)(A) is a radical of unstable acid

b)acid of (A) can replaced by dil.HCl

c)Acid of (A) can be replaced by hot conc. H2SO4

d).All the previous

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9 / 31

Acid form which nitrate ion is derived from is ….

a)less stable than H2CO3 but more stable than H2SO4

b) less stable than BaCl2 but more stable than H2CO3

c) less stable than H3PO4 but more stable than H2S.

d) less stable than H2SO4 but more stable than H3PO4

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10 / 31

Dil. HCl is used to detect CO3^2-because …

a)HCl is stronger than CO32-

b) HCl is stronger than acid of CO32-

c) HCl is more stable than CO32-

d.) HCl is more stab than acid of CO32-

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11 / 31

If A=K2CO3 , B=CaCO3 and C=(NH4)2CO3

a)A and B are soluble but C springly soluble in H2O

b.) A and C are soluble but B springly soluble in H2O

c) A ,B and C are soluble in H2O

d) A,B and C are springly soluble in H2O

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12 / 31

Ca(HCO3)2 and Al(HCO3)3 are two salts :

a)both of them are soluble in water.

b)both of the are pringly soluble in water

c) The first is soluble but the second is pringly soluble in H2O

d)The second is soluble but the first is pringly soluble in H2O

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13 / 31

Which of the following pairs of ions forms ppt. when mixed with a dilute aqueous medium ?

a.)Fe3+ , PO43-

b)Na+ ,S2-

c)NH4+ ,CO3+

d)K+ , SO42-

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14 / 31

All carbonate of Na+ ,Mg2+, Ca2+ are soluble in ….

a)acids.

b)benzene

c) water

d)kerosene

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15 / 31

All bicarbonate of Na+ ,Mg2+, Ca2+ are soluble in ….

a)water

b)acids

c) water and acids.

d)water and acids are not correct

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16 / 31

which of the following may give a white ppt.

a)NaHCO3+KCl >>>>>>

b)NaHCO3(aq) +BaCl2(aq) >>>>>

c) Na2CO3(aq) +BaCl2(aq.) >>>>>

d)Na2CO3(aq) +KCl(aq) >>>>>

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17 / 31

By adding dil. HCl to salts of unstable acids it can replace them in the form of …..

a)volatile acids

b) acids decompose into gases

c) a and .b

d)no correct answer

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18 / 31

All of thes unstable acids replaced by dil. HCl then decoplosed except …

a)H2S.

b)H2SO4

c)H2CO3

d) H2SO3

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19 / 31

By adding dil. HCl to ……… salt it gives a bad smell gas

a)Na2CO3

b)Na2S.

c)Na2S2O3

d)Na2SO4

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20 / 31

By adding dil. HCl to ……… salt it gives gas turbid lime water

a)Na2CO3 ,NaHCO3.

b)Na2S , Na2SO3

c)NaNO2 and Na2SO3

d)NaCl and KCl

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21 / 31

By adding dil. HCl to ……… salt it gives an irritating smell gas

a)Na2CO3 ,NaHCO3

b)Na2S , Na2SO3

c)Na2S2O3 and Na2SO3.

d)Na2SO4

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22 / 31

By adding dil. HCl to a solid ……… salt it gives colorless gas turns into reddish brown gas at the mouth of the tube

a)NaNO2.

b)Na2S , Na2SO3

c)Na2S2O3 and Na2SO3

d)NaCl and KCl

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23 / 31

By adding MgSO4 to ……… salts solutions it gives white ppt on cold

a) Na2CO3.

b) NaHCO3

c) Na2CO3 ,NaHCO3

d)NaCl and KCl

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24 / 31

By adding MgSO4 to ……… salts solutions it gives white ppt after heating

a) Na2CO3

b) NaHCO3.

c) Na2CO3 ,NaHCO3

d)Ag2S

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25 / 31

By adding AgNO3 to ……… salt solutions it gives black ppt directly

a) Na2S.

b) Na2SO3

c) Na2CO3 ,NaHCO3

d)Ag2S

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26 / 31

By adding AgNO3 to ……… salt solutions it gives balck ppt after heating

a) Na2S

b) Na2SO3.

c) Na2CO3 ,NaHCO3

d)Ag2S

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27 / 31

By adding I2 solution to ……… salt solutions it removes the brown color of I2

a) Na2S

b) Na2S2O3.

c) Na2CO3 ,NaHCO3

d)Ag2S

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28 / 31

By adding acidified KmnO4 solution to ……… salt solutions it removes the brown color of I2

a) Na2S d)Ag2S

b) NaNO2.

c) Na2CO3 ,NaHCO3

d)no correct answer

if(typeof window.quizOptions_6 === 'undefined'){ window.quizOptions_6 = []; } window.quizOptions_6['119'] = 'eyJxdWVzdGlvbl9hbnN3ZXIiOnsiNDcwIjoiMCIsIjQ3MSI6IjEiLCI0NzIiOiIwIiwiNDczIjoiMCJ9fQ==';

29 / 31

By adding AgNO3 to ……… salt solutions it gives white ppt. that turns into balck ppt after heating

a) Na2S

b) Na2SO3.

c) Na2CO3 ,NaHCO3

d)no correct answer

if(typeof window.quizOptions_6 === 'undefined'){ window.quizOptions_6 = []; } window.quizOptions_6['120'] = 'eyJxdWVzdGlvbl9hbnN3ZXIiOnsiNDc0IjoiMCIsIjQ3NSI6IjEiLCI0NzYiOiIwIiwiNDc3IjoiMCJ9fQ==';

30 / 31

By adding dil. HCl to ……… solid salt it gives irritating smell gas and a yellow ppt of an element

a) Na2S

b) Na2S2O3.

c) Na2CO3 ,NaHCO3

d)no correct answer

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31 / 31

By adding dil. HCl to ……… solid salt it gives irritating smell gas ,and changes a pape wet with acidified potsium dicromate from orange to green yellow ppt of an element

a) Na2S

b) Na2S2O3.

c) Na2CO3 ,NaHCO3

d)a and b

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Your score is

The average score is 31%

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