Question

TRUE OR FALSE :

1. Nitrogen dioxide (NO₂) is absorbed by ferrous sulphate solution and becomes brown. 

2. Heavy metal chlorides like AgCl, HgCl₂ etc. do not respond to chromyl chloride test. 

3. Bright yellow precipitate of silver iodide is partially soluble in concentrated ammonia solution and fairly soluble in hypo solution.

4. Triodide ions (I₃^–) produced by the reaction of Cu²⁺ and KI solution are not reduced by excess of sodium thiosulphate solution. 

Hint : 2 Cu²⁺ + 5 I ^– → CuI ↓ + I₃^– (I₂ + I ^–) 

I₃^– + 2 S₂O₃^2– → 3 I ^– + S₄O₆^2– 

5. Ammonium hydrogen sulphate on heating gives nitrogen, ammonia and sulphur dioxide gases.

Answer 1

1. True 
2. True 
3. True 
4. False  
5. True