The metal that cannot be obtained by electrol | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Metals that are highly reactive,such as those in the $s$-block (e.g.,$Ca$,$Na$,$K$),have a very negative standard reduction potential. When an aqu

Vedclass · Accepted Answer

$Ca$

Vedclass · Answer

(B) Metals that are highly reactive,such as those in the $s$-block (e.g.,$Ca$,$Na$,$K$),have a very negative standard reduction potential. When an aqueous solution of their salts is electrolyzed,water is reduced at the cathode instead of the metal ion. The reaction at the cathode is $H_2O(l) + e^- \rightarrow \frac{1}{2} H_2(g) + OH^-(aq)$. Therefore,these metals cannot be obtained by the electrolysis of their aqueous salt solutions; they are typically extracted by the electrolysis of their molten salts.

The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is $:$

Similar Questions

During electrolysis,the species discharged at the cathode are:

When fused $NaCl$ undergoes electrolysis,the product formed at the cathode is:

The cell used for the electrolysis of fused $NaCl$ is

For the extraction of sodium from $NaCl$,an electrolytic mixture of $NaCl + Na_3AlF_6 + CaCl_2$ is used. During the extraction process,only sodium is deposited at the cathode,while $K$ and $Ca$ are not,because:

If the passage of current liberates $H_2$ at cathode and $Cl_2$ at anode then the solution is

Vedclass Test Series

Exam Paper Generator

Online Exam Module