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: d) iii and iv
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?