Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
  1. Au
  2. Cu
  3. Na
  4. K
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (iii) and (iv)

AcademicChemistryNCERTClass 10

Correct Answer: (d) (iii) and (iv)

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

Updated on 10-Oct-2022 13:27:24