In which of the following method of purification, metal is converted to its volatile compound which is decomposed to give pure metal?

(i) heating with a stream of carbon monoxide.

(ii) heating with iodine.

(iii) liquation.

(iv) distillation.

Correct Answers:

(i) heating with a stream of carbon monoxide

(ii) heating with iodine

Explanation: Heating with iodine or with a steam of carbon monoxide are the methods of purification in which the metal is converted to its volatile

compound which is decomposed to give pure metal.