Question

A metal '$M$' cannot be reduced by any reducing agents such as $H_2,CO$ and carbon. It has to be extracted by the electrolysis of fused metals salts. Identify '$M$'.

• A. $Zn$
• B. $Ca$
• C. $Cu$
• D. $Hg$

Answer 1

Answer: (B)

$Ca$

Because of its position in the reactivity series of metals, $K,Na,Ca,Mg,Al$ cannot be extracted using carbon, they are above carbon and cannot be displaced by it. So, these metals are too reactive to be obtained by carbon reduction of its oxide and another method must be employed which is called electrolysis. From the given options $Ca$ is the metal $M$.