Chemistry For Third Secondary → Quiz2:chapter2 chemical analysis

Created on November 08, 2022 By

gogorabei

Quiz2:Chapter2 chemical analysis

Detection of Anions (acidic radicals ) by using Dil. Hydrochloric acid (6 anions)

Carbonate, Bicarbonate, Sulphide ,Thiosulphide ,Nitrite

1 / 24

by replacing sodium cation by calcium cation in sodium carbonate so salt will …..

a)be insoluble in H2O.

b)be soluble in H2O

c)expel HCc cid from its salts

d)reacts with HCl(aq) nd hydrogen gas evolves

2 / 24

which of the following there is no rection take place

a)FeS + HCl dil

b)FeSO4 + HCl Dil.

c)FeSO3 + HCl dil

d)all of them

3 / 24

when HCl Dil. is added to solid salt has a chemical formula (A₂X) gas evolves which form with wet paper by(Y₂B) solution a black ppt. the anion (Y)is ……

a)S2+ -

b)SO32-

c.) CH3COO-

d)HCO3

4 / 24

The anions which give NO then NO2 when adding HCl dil to them

a)Nitrite.

b)Nitrate

c) a and b

d) no correct answer

5 / 24

The anions which give CO2 when adding HCl dil to them

a)Nitrite .

b) bicarbonate

c)carbonate

.d) a and b

6 / 24

The anions which give NO2 when adding HCl dil to it

a)Nitrite.

b)Nitrate

c) a and b

d)no correct answer

7 / 24

The anions which give H2S when adding HCl dil to it

a)Sulphide.

b)Sulphite

c)Thiosulphite

d) a and b

8 / 24

By adding Dil. HCl to salt of …… ion it gives a gas of very irritating smell

a)sulphide .

b)thiosulphide

c)sulphite

.d)b and c are correct

9 / 24

The anions that produce SO2 when adding HCl dil are..

a)Sulphide .

b)Sulphite

c)Thiosulphite

.d) a and b

10 / 24

Dil HCl can defferentiate between all of the folowing except …..

a)Na2SO3 and Na2S2O3 .

b)Na2S and NaNO2

c)Na2SO3 and NaCl

d.)Na2CO3 and NaHCO3

11 / 24

A gas that turns lime water in a short time into milky is produced by adding Dil HCl to solid salts of ….

a)NaHCO3

b)Na2CO3

c)a and b.

d)no correct answer

12 / 24

A gas that turns lime water in a short time into milky is produced by adding Dil HCl to solid salts of ….

a)NaHCO3

b)Na2CO3

c)a and b.

d)no correct answer

13 / 24

By passing CO2 gas in clear lime water the graph refers to the relation between mass of precipitate and time is …

14 / 24

Substanc (A) added to covert solid carbonate slat into CO2 gas and substance (B) added to convert carbonate salt solution into bicarbonate salt so :

a)both of A and B are HCl

b) Both of A and B are CO2 gas

c) A is HCl and B is CO2.

d)A is CO2 and B is HCl acid

15 / 24

A gas that oxidized at the mouth of the tube is produced by main experement for …

a)Ammonium ion

b)Nitrate ion

c)Nitrite ion.

d)no correct answer

16 / 24

A colorless gas that oxidized at the mouth of the tube to form redish brown gas is…

a)nitric oxide.

b)nitrogen oxide

c) Nitrous oxide (N20)

d)nitrogen dioxide

17 / 24

The color of nitrogen dioxide is …

a)colorless

b)reddish brown.

c)red

d)yellow

18 / 24

In detection of anion of salt (X) by using dil HCl acid no gas evolved all the following are correct except …

a)anion of salt (X) may found in group of conc. H2SO4 or BaCl2 solution

b)you may need gently heating to eject gases

c)The cation of the salt (X) makes no reaction with dil HCl acid

d)you need to shake the test tube well to mix the reactant

19 / 24

All the following are correct in using HCl dil. With solid salts except :

a)With CO32+ ion gives a gas which turns lime wate into turbid in a short time

b)with NO2- gives directly reddish brown color gas.

c)with S2- ion gives a gas which turns paper wet witj lead II acetate into black

d)with SO3- ion gives a ga which turns paper wet with acidified potassium dichromate from orange to green

20 / 24

The following solutions: A=(CH3COO)2Pb,B=Ca(OH)2 C=K2Cr2O7/H2SO4

The can used to detect three gases which are …….. respectively

a)CO2,SO2 and H2S

b)H2S ,CO2 and SO2.

c)SO2 ,CO2 and H2S

d)no correct answer

21 / 24

a)Thiosulphuric acid is more stable than HCl dil

b) Thiosulphuric acid is less stable than HCl dil..

c)Thiosulphuric acid is replace H2SO4 conc. from its salts

d) Thiosulphuric acid is more stable than HCl dil.

22 / 24

Anion (X^2-) from HCl dil. group ….

a)Na2X can react with HBr acid

b)CO2 or SO2 or H2S gases may be obtained from adding dil HCl to the salt Na2X

c)acid of (X2-) can replace acid of another anion from dil. HCl to the salt Na2X

d) a and b are correct.

23 / 24

In detection of anion of salt (X) by using dil HCl acid no gas evolved all the following are correct except …

a)anion of salt (X) may found in group of conc. H2SO4 or BaCl2 solution

b)you may need gently heating to eject gases

c)The cation of the salt (X) makes no reaction with dil HCl acid.

d)you need to shake the test tube well to mix the reactant

24 / 24

SO₂ gas produced by adding ……. To Na₂SO₃

a)BaCl2 solution

b)HCl Dil

c)Hot conic H2SO4

. d) b. and c

Your score is

The average score is 33%

Chemistry For Third Secondary

Curriculum

Quiz2:chapter2 chemical analysis

Modal title