Question

Which of the following metals are refined by electrolytic refining?

(i)$Au$
(ii)$Cu$
(iii)$Na$
(iv)$K$

• A. (i) and (ii)
• B. (i) and (iii)
• C. (ii) and (iii)
• D. (iii) and (iv)

Answer 1

The correct option is A (i) and (ii)

The metals produced by various reduction processes are not very pure. They contain impurities, which must be removed to obtain pure metals. The most widely used method for refining impure metals is electrolytic refining. Many metals, such as copper and silver are refined electrolytically.

Hence the correct option is A.