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.

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