Question

Poling process :

• A. Reducessno2 to Sn
• B. Oxidises impurities like iron and removes as scum
• C. Uses green poles
• D. All of the above are correct

Answer 1

Answer: (D)

All of the above are correct

Answer 2

This method is used for the purification of those impure metals which contain the impurities of their own impurities for example CuO in Cu and SnO in Sn.