Quiz

1. Which reagent is used to precipitate Group 1 cations in semi-micro qualitative analysis?

A. Dilute sulfuric acid
B. Dilute hydrochloric acid
C. Dilute nitric acid
D. Dilute acetic acid

2. What is the color of the precipitates formed by Ag⁺, Pb²⁺, and Hg₂²⁺ with dilute HCl?

A. Yellow
B. Black
C. White
D. Brown

3. Which chloride precipitate is soluble in hot water?

A. AgCl
B. PbCl₂
C. Hg₂Cl₂
D. All are soluble in hot water

4. Which ion gives a black precipitate with aqueous ammonia?

A. Ag⁺
B. Pb²⁺
C. Hg₂²⁺
D. None of these

5. Which chloride precipitate dissolves in excess aqueous ammonia to form a soluble complex?

A. AgCl
B. PbCl₂
C. Hg₂Cl₂
D. None of these

6. Which ion is confirmed by formation of yellow PbI₂ with KI?

A. Ag⁺
B. Pb²⁺
C. Hg₂²⁺
D. None of these

7. Which precipitate is called calomel?

A. AgCl
B. PbCl₂
C. Hg₂Cl₂
D. HgCl₂

8. AgCl dissolves in which reagent to form a soluble complex?

A. Concentrated HCl
B. Dilute H₂SO₄
C. Excess NH₄OH
D. NaOH solution

9. Which chloride precipitate remains insoluble in hot water and ammonia?

A. Ag⁺
B. Pb²⁺
C. Hg₂²⁺
D. None of these

10. Which ion’s confirmatory test involves forming a soluble complex with thiosulfate?

A. Ag⁺
B. Pb²⁺
C. Hg₂²⁺
D. All of these

Quiz on Semi-Micro Qualitative Analysis of Group 1 Cations