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CBSE Notes 2011-2012

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

Multiple choice question

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

unknown

(i) and (ii)

unknown

(i) and (iii)

unknown

(ii) and (iii)

unknown

(iii) and (iv)