(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.