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

(i) and (ii) 

(i) and (iii)

(ii) and (iii) 

(iii) and (iv)

 

Answer.:

 

  • In electrolytic refining, electric current is used to purify metals.  

  • Metals like Cu, Ag, Zn, Au are refined by this method.

  • Na, K, and Ca cannot be refined using electrolysis because they are highly reactive. They are refined by electrolytic reduction instead.

  1. Class 10
  2. Chapter 3 Class 10 - Metals and Non-Metals (Term 1)

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo