In electrolytic fefining of cooper, pure Cu os used as anode.
(B) Zone refining is based on the principle that impurities are more solutble in the melt than in the solid states of the metal. (D) Very pure Zr may be obtained by Galvanisation.
(E) In copper smelting hot air is used to convery `Cu_(2) S` to `CuSO_(4).`

Options

A. A,B,E
B. B,C
C. B,C,D,E
D. B,C,D

Answer

B

Explanation

In metallurgy
(A) Cu is used as anode
(B) In zone refining process, impure metal rod is converted into pure metallic rod.
(C ) `TiI _(4) at 1100^(@)` C gives pule Ti.
`TiI_(4) overset (gt 1100^(@)C)to Ti + 2I_(2)`
(D)Very pure Zr is not used for Galvanisation
(E) No hot air is required to convert `Cu_(2) ` S to `CuSO _(4)` in copper smelting.
`therefore (B), (C )`