Question

What product are formed during the electrolysis of a concentrated aqueous solution of sodium chloride using an electrolytic cell in which electrodes are separated by a porous pot?
I. $NaOH(aq)$ II. $C{l}_2(g)$
III. $NaCl{O}_3(aq)$ IV. $H_2(g)$
V. $NaClO(aq)$
Select the correct choice.

• A. I, II and V
• B. I, II and IV
• C. I and II
• D. I, III and V

Answer 1

Answer: (B)

$NaCl(aq)\rightleftharpoons N{a}^{+}(aq)+Cl(aq)$
At anode $2C{l}^{-}(aq)\to C{l}_2(g)+2e^{-}$
At cathode $2N{a}^{+}(aq)+2e^{-}\to 2Na(l)$
$2Na(l)+2H_{2}O\to 2NaOH(aq)+H_2(g)$
$C{l}_2(g)$ is formed at anode and $NaOH$ and $H_2$ are formed at cathode. Since cathode and anode are separated. Hence, there is no reaction between the products formed at the cathode and anode.