[" The metal which can be purified "],[" by auto reduction or self reduction "],[" (A) "Fe],[" (B) "Zn],[" (C) "Cu],[" (D) "Al]

A metal obtained by auto reduction or self reduction

The alkali metal which can be obtained by reduction of its carbonate with carbon is

Which of the following oxides cannot be reduced by auto or self reduction ?

Alkali metals can be obtained by chemical reduction of their compounds.

Auto reduction process is used in extraction of

[" By which process "Pb" and "" Sn are extracted by "-],[" (A) Extracted carbon reduction: Self reduction "],[" (B) Self reduction: Carbon reduction "],[" (C) Electrolytic reduction: Cyanide process "],[" (D) Cynide process electrolytic reduction "]