Chemistry For Third Secondary → Quiz1:chapter2:chemical analysis

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

2 / 31

Analysis of inorganic compounds included detection of ……

a)anions

b)cations

c.)a and b

d)functional group

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

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

5 / 31

The most stable acid is ….

a)H2SO4.

b)HCl

c)H2CO3

d)HNO3

6 / 31

7)The most stable acid is ….

a)H2SO4.

b)HCl

c)H2CO3

d)HNO3

7 / 31

Dil. HCl can detect all the following except ….

a)sulphide

b).sulphate

c) thiosulphate

d)sulphite

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

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

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-

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

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

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-

14 / 31

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

a)acids.

b)benzene

c) water

d)kerosene

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

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) >>>>>

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

18 / 31

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

a)H2S.

b)H2SO4

c)H2CO3

d) H2SO3

19 / 31

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

a)Na2CO3

b)Na2S.

c)Na2S2O3

d)Na2SO4

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

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

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

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

24 / 31

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

a) Na2CO3

b) NaHCO3.

c) Na2CO3 ,NaHCO3

d)Ag2S

25 / 31

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

a) Na2S.

b) Na2SO3

c) Na2CO3 ,NaHCO3

d)Ag2S

26 / 31

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

a) Na2S

b) Na2SO3.

c) Na2CO3 ,NaHCO3

d)Ag2S

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

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

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

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

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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The average score is 31%

Chemistry For Third Secondary

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Quiz1:chapter2:chemical analysis

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