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Match the following :
List-I List-II
I. Cyanide process a) Ultrapure Ghee
II. Floatation process b) Pine oil
III. Electrolytic c) Extraction of $A l$ reduction
IV. Zone refining d) Extraction of $Au$

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I - (c), II - (a), III - (d), IV - (b)

I - (d), II - (b), III - (c), IV - (a)

I - (c), II - (b), III - (d), IV - (a)

I - (d), II - (a), III - (c), IV - (b)

answer is B.

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Detailed Solution

The Cyanide is the method of extracting gold and silver by dissolving them in the dilute solution of sodium cyanide or potassium cyanide.
Sulphide ores respond best to the froth flotation process. The method is based on the distinct ways that water and pine oil wet the ore and gangue particles.
Al, Cu, Ag, Mg, and other materials can be purified by electrolytic reduction. Crude metal is employed as the anode and only pure metal as the cathode. The electrolyte is an aqueous solution of the metal's salt.
Zone Refining is employed to get metal of very high purity i,e. ultra pure samples of $GeSi, B, Ga$ . In This process is based on the idea that impurities in the melt are more soluble than pure metal. It's applied to produce ultrapure ghee.

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