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

1. (A) (B) (C) (D) - (iv) (ii) (iii) (i)
2. (A) (B) (C) (D) - (ii) (iii) (i) (v)
3. (A) (B) (C) (D) - (ii) (i) (iii) (iv)
4. (A) (B) (C) (D) - (iii) (ii) (iv) (v)

Correct answer: (A) (B) (C) (D) - (iv) (ii) (iii) (i)

Solution

The cyanide process is used for the extraction of gold (Au), froth flotation is used for dressing of zinc sulfide (ZnS), electrolytic reduction is used for the extraction of aluminum (Al), and zone refining is used for obtaining ultrapure germanium (Ge).

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