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Match the items in Column I with those in Column II and choose the correct code from the options given: Column I I. Cyanide method II. Froth flotation III. Electrolytic extraction IV. Zone purification Column II A. Ultra-pure Ge B. Pine oil C. Obtaining Al D. Obtaining Au

1. I-C, II-A, III-D, IV-B
2. I-D, II-B, III-C, IV-A
3. I-C, II-B, III-D, IV-A
4. I-D, II-A, III-C, IV-B

Correct answer: I-D, II-B, III-C, IV-A

Solution

The cyanide method is specifically used for extracting gold (Au), froth flotation utilizes pine oil as a collector for separating minerals, electrolytic extraction is a common method for obtaining aluminum (Al), and zone purification is a technique used to achieve ultra-pure germanium (Ge).

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