Analytical Chemistry MCQs

By: Prof. Dr. Fazal Rehman | Last updated: April 16, 2025

1. Which of the following is aqua regia?
(A) 1 part conc. HCl and 3 parts conc. HNO₃
(B) 3 parts conc. HCl and 1 part conc. HNO₃
(C) 2 parts conc. HCl and 1 part conc. HNO₃
(D) 3 parts conc. HCl and 2 parts conc. HNO₂

2. In a qualitative inorganic analysis of basic radicals, HCl is preferred to HNO₃ for preparing a solution of a given substance. This is because:
(A) Nitrates are not decomposed to sulphides
(B) Nitric acid contains nitrogen
(C) Hydrochloric acid is not an oxidizing agent
(D) Chlorides are easily converted to sulphides

3. On heating a mixture of NaCl and potassium dichromate with conc. sulphuric acid, the compound formed is:
(A) Chromic chloride
(B) Chromyl chloride
(C) Chlorine dioxide
(D) Chromic acid

4. Mark the compound which turns black with Ammonium Hydroxide.
(A) Lead chloride
(B) Mercurous chloride
(C) Mercuric chloride
(D) Silver chloride

5. Silver halide which is least soluble in Ammonium Hydroxide is:
(A) AgBr
(B) AgF
(C) AgCl
(D) AgI

6. How many ml of 1 M H₂SO₄ solution is required to neutralize 10 ml of 1 M NaOH solution?
(A) 2.5 ml
(B) 5.0 ml
(C) 10 ml
(D) 20 ml

7. Which of the following sulphides is not soluble in hot dilute nitric acid?
(A) CuS
(B) ZnS
(C) NiS
(D) CdS

8. Which one of the following sulphides is yellow?
(A) ZnS
(B) CdS
(C) NiS
(D) PbS

9. II B sub-group of basic radicals consists of:
(A) As, Cd and Hg
(B) Zn, Cd and Hg
(C) Cu, Hg and Au
(D) As, Sb and Sn

10. In which mode of expression does the concentration of a solution remain independent of temperature?
(A) Molarity
(B) Normality
(C) Formality
(D) Molality

11. The compound whose 0.1 M solution is basic is:
(A) Sodium acetate
(B) Ammonium chloride
(C) Ammonium sulphate
(D) Ammonium acetate

12. Aniline is separated from a mixture by:
(A) Fractional crystallization
(B) Fractional distillation
(C) Steam distillation
(D) Vacuum distillation