Give Mond process for refining of nickel.

Describe the principle involved in each of the following processes: (a) Mond process for refining of nickel. (b) Column chromatography for purification of rare elements.

In Mond's process for refining of nickel, the following reactions occur. The value of 'x' is --------. Ni+xCOoverset("330 K - 350 K")rarr No(CO)_(x)overset("450 K - 407 K")rarr Ni_((s))+xCO_((g))

(a) What are the two requirements for vapour phase refining? Write the chemical reactions which occur during Mond's process for the refining of nickel.

The volatile complex formed in Mond process during refining of nickel is _________.

Complexes formed in the following methods are: (I) Mond's process for purification of nickel (II) Removal of ureacted AgBr from photographic plate (III) Removal of lead poisoning from the body

Complex formed in the following methods are (I) Mond's process for purification of nickel (II) Removal of lead poisoning from the body (III) Cyanide process for extraction of silver (IV) Froth flotation process for separation of ZnS from galena ore by using depresent.