Metals are refined by using different methods. Which of the following

1.	Metals are refined by using different methods. 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» The answer is (d) (iii) and (iv) Sodium and potassium are at the top in reactivity series hence they can be refined by electrolytic refining.

Metals are refined by using different methods. 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»

The answer is (d) (iii) and (iv)

Sodium and potassium are at the top in reactivity series hence they can be refined by electrolytic refining.