Question

Match items of Column I with the items of Column II and
asign the correct code : [2016]
Column-I Column-II
(A) Cyanide (i) Ultrapure Ge
process
(B) Froth flotation (ii) Dressing of ZnS
process
(C) Electrolytic (iii) Extraction of Al
reduction
(D) Zone refining (iv) Extraction of Au
(v) Purification of Ni
Code :
(a) (b) (c) (d)
(a) (iv) (ii) (iii) (i)
(b) (ii) (iii) (i) (v)
(c) (i) (ii) (iii) (iv)
(d) (iii) (iv) (v) (i)

Answer 1

(iv) (ii) (iii) (i) is the correct option.

Explanation:

• The forth floatation is the process by which the sulphide ores are cleaned and separated from the gangue.

• This process involves the use of pine oil and water where the sulphide ores float.

• Electrolytic refining is the process by which ultra pure metals are obtained by using the pure metal as cathode and impure metal as anode and the salt solution of the metal as electrolyte.

• The pure metal is diposited on the cathode.

• The zone refining is used to separate the magnetic ore from the non magnetic gangue.

• Here the magnetic coils are used as the conveyer where the magnetic ores are separated.

• The leaching is the process by which metals like silver etc are made soluble by reaction with cyanide where the other impurities are not soluble.

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