Chapter 18: Qualitative Analysis

1

Which ion gives a lilac color in the flame test?

A Na⁺ B K⁺ C Ca²⁺ D Cu²⁺

2

Which reagent is used to identify ammonium ion?

A Silver nitrate B Sodium hydroxide C Barium chloride D Dilute acid

3

White precipitate with silver nitrate indicates which ion?

A SO₄²⁻ B CO₃²⁻ C Cl⁻ D NO₃⁻

4

Which gas has a pungent smell and turns red litmus blue?

A CO₂ B NH₃ C H₂ D SO₂

5

Which analysis identifies ions present in a compound?

A Qualitative analysis B Quantitative analysis C Thermal analysis D Volumetric analysis

6

Which test helps confirm CO₃²⁻ ion?

A Silver nitrate test B Flame test C Limewater test D Biuret test

7

Which ion produces a green flame?

A Cu²⁺ B Na⁺ C Ca²⁺ D K⁺

8

Which ion gives golden yellow flame?

A Na⁺ B K⁺ C Ca²⁺ D Cu²⁺

9

White precipitate with barium chloride indicates which ion?

A CO₃²⁻ B Cl⁻ C SO₄²⁻ D NO₃⁻

10

Which test identifies functional groups by reactions?

A Qualitative analysis B Quantitative analysis C Volumetric analysis D Gravimetric analysis

11

Which reagent distinguishes sulfate from carbonate?

A Dilute HCl B Barium chloride C Silver nitrate D Sodium hydroxide

12

Which test is safest for identifying gases?

A Ignition test B Flame test C Litmus test D Heating test

13

Which test helps identify gases by color change?

A Flame test B Litmus test C Precipitation test D Density test

14

Which ion does not form a precipitate test easily?

A Cl⁻ B SO₄²⁻ C NO₃⁻ D CO₃²⁻

15

Which gas turns moist red litmus paper blue?

A CO₂ B NH₃ C SO₂ D H₂

16

Which precipitate is formed when AgNO₃ reacts with chloride?

A Yellow B White C Blue D Green

17

Which test identifies sodium ion?

A Litmus test B Flame test C Precipitation test D Gas test

18

Which gas turns potassium dichromate paper green?

A CO₂ B NH₃ C SO₂ D H₂

19

Which gas is evolved when carbonate reacts with acid?

A NH₃ B CO₂ C SO₂ D H₂

20

Which solution is used to test acidic or basic gases?

A Limewater B Litmus solution C Silver nitrate D Barium chloride

21

Which reagent is added before silver nitrate in chloride test?

A NaOH B Dilute nitric acid C Dilute sulfuric acid D Ammonia

22

Which gas produces a pop sound when ignited?

A Oxygen B Hydrogen C Nitrogen D Carbon dioxide

23

Which reagent gives white precipitate with sulfate?

A AgNO₃ B BaCl₂ C NaOH D HCl

24

Which gas turns limewater milky first and then clear?

A NH₃ B SO₂ C CO₂ D H₂

25

Which gas has a choking smell?

A NH₃ B SO₂ C H₂ D O₂