Halogens (Chlorine, Bromine and Iodine)

1. Why halogens are never found in the Free State in nature?

2. A test tube contains a solution of one of the following salts: NaCl, NaBr and NaI. Describe a single test that can distinguish among these salts.

3. Give any one chemical reaction to prepare chlorine gas from hydrochloric acid.

4. Give a chemical reaction to show oxidizing action of chlorine.

5. How would you obtain bromine from HBr?

6. What happens when KBr is heated with conc. H₂SO₄ acid?

7. Why can’t HI be prepared by the action of conc. H₂SO₄ on NaI?

8. Give the action of

(i) KI on copper sulphate solution

(ii) Heat on lime stone.