Fill in the blanks by selecting the option with the correct words.
The process of removing impurities from the impure metal to obtain pure metal is known as _of metal. The most widely used method for refining is _. In this method, the impure metal is taken as and the pure metal is taken as _.

refining, electrolytic refining, anode, cathode

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calcination, electrolysis, cathode, anode

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refining, smelting, cathode, anode

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smelting, calcination, anode, cathode

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Solution

The correct option is A refining, electrolytic refining, anode, cathode
The process of removing impurities from impure metal is called refining.
Electrolytic refining is a widely used method of refining as it is a cost-effective and efficient method.
During the process, the impure metals are taken as anode and, pure metals are taken as the cathode. As electrolysis proceeds, the pure metal keeps depositing on the cathode and, the impurities settle at the bottom.
Hence the correct option is A.

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Similar questions

Q. In the electrolytic refining of metals, electrolysis of an aqueous solution of its complex salt is done with impure metal as anode and a strip of pure metal as cathode. This method cannot be used for the refining of:

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(ii) In poling, the molten impure metal is stirred with green poles of wood.

(iii) In electrolyte refining of metals, impure metal is made as cathode and a thin strip of pure metal is made as anode.

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