Question

 TRUE OR FALSE :

1. Lead sulphate is soluble in ammonium acetate solution but barium sulphate is insoluble in dilute HCl.

2. HgS dissolves in both sodium sulphide solution and aquaregia. 

3. White precipitate is obtained when H₂S gas is passed through a solution of copper nitrate. 

4. Black precipitate of Cu(SCN)₂ turns into white precipitate when it reacts with saturatd solution of SO₂ in water. 

Hint : 2Cu(SCN)₂ + SO₂ + 2H₂O → 2Cu(SCN)¯ (white) + 2SCN ^– + SO₄^2– 

5. The group reagent for III group basic radicals is NaOH.

Answer 1

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