QJEEM22Ch9788: JEE Main 2022 Chemistry - Class 11 JEEM22Ch9788 Solution: In the industrial production of which of the following,…

Question

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In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?

Accepted Answer

Molecular hydrogen is produced as a byproduct in the industrial production of

\mathrm{NaOH}

by electrolysis of aq

\mathrm{NaCl}

solution

\mathrm{NaCl} \rightarrow \mathrm{Na}^{+}+\mathrm{Cl}^{-}

\begin{aligned}&amp; \mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{H^{+}}+\mathrm{OH}^{-}\end{aligned}

Cathode :

2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{e} \rightarrow \mathrm{H}_{2}+2 \mathrm{OH}^{-}

Anode :

2 \mathrm{Cl}^{-} \rightarrow \mathrm{Cl}_{2}+2 \mathrm{e}

\mathrm{NaOH}

is crystallised from the remaining part of electrolyte.

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