Chapter 18: Qualitative Analysis + Chapter 19: Chromatography

1

Chromatography is mainly a _____ technique.

A Separation B Heating C Cooling D Compression

2

Which test is used for anions?

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

3

What is a chromatogram?

A A type of solvent B The separated pattern of components C The stationary phase D The mobile phase

4

Which colour component usually moves slowest?

A Most soluble B Least adsorbed C Strongly adsorbed D Lightest

5

Chromatography helps to check:

A Purity of a substance B Boiling point C Density D Volume

6

What happens if solvent front reaches top?

A Experiment is stopped B More sample added C Heating starts D Rf increases

7

What is qualitative analysis mainly concerned with?

A Amount of substance B Nature of substance C Mass of substance D Volume of substance

8

Which technique is simple and inexpensive?

A Gas chromatography B Paper chromatography C HPLC D Column chromatography

9

Which reagent distinguishes sulfate from carbonate?

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

10

Which reagent is used to test carbonate ions?

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

11

Which test is commonly used to identify metal ions?

A Litmus test B Flame test C Iodine test D Biuret test

12

White precipitate with barium chloride indicates which ion?

A CO₃²⁻ B Cl⁻ C SO₄²⁻ D NO₃⁻

13

Which reagent gives white precipitate with sulfate?

A AgNO₃ B BaCl₂ C NaOH D HCl

14

Which of the following is NOT a type of chromatography studied here?

A Paper chromatography B Thin-layer chromatography C Gas chromatography D None of these

15

Which precipitate dissolves in ammonia solution?

A BaSO₄ B AgCl C CaCO₃ D PbSO₄

16

Which ion releases ammonia on heating?

A Na⁺ B K⁺ C NH₄⁺ D Ca²⁺

17

Which ion is basic in nature?

A Cl⁻ B SO₄²⁻ C NH₄⁺ D CO₃²⁻

18

Chromatography is widely used in:

A Agriculture and chemistry B Carpentry C Welding D Plumbing

19

In a chromatogram, separated substances appear as:

A Lines only B Spots or bands C Bubbles D Crystals

20

In thin-layer chromatography, the stationary phase is usually:

A Paper B Water C Silica gel or alumina D Alcohol

21

Which ion produces ammonia gas on heating with NaOH?

A Na⁺ B NH₄⁺ C Ca²⁺ D K⁺

22

Which solution is used to test acidic or basic gases?

A Limewater B Litmus solution C Silver nitrate D Barium chloride

23

Which color is produced by sodium ion in a flame test?

A Green B Brick red C Golden yellow D Lilac

24

Which ink component travels the farthest?

A Most adsorbed B Least soluble C Most soluble in solvent D Darkest colour

25

Which observation confirms ammonium ion?

A Pop sound B White precipitate C Pungent smell of ammonia D Green flame