[" 17.CO forms a volatile compound with "],[[" (a) "Ni," (b) "Cu],[" (c) "Al," (d) "Si]]

Most volatile compound is

the most volatile compound is

Carbon monoxide forms volatile compound with :

CO forms a volatile carbonyl complex with which of the following metals ?

Which of the follwing are main requirements for vapour phase refining ? (i) Metal should form a volatile compound with the reagent (ii) The volatile compound should be easily decompsoable to give back pure metal (iii)Metal should be very reactive and form a stable compound with the reagent