Question:

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

Updated On: Jul 6, 2024
  • NaOH
  • NaCl
  • Na metal
  • \(Na_2CO_3\)
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The Correct Option is A

Solution and Explanation

Molecular hydrogen is produced as a byproduct in the industrial production of NaOH by electrolysis of aq \(NaCl\) solution

\(NaCl → Na^+ + Cl^–\)

\(H_2O ⇌ H^+ + OH^-\)

Cathode : \(2H_2O + 2e → H_2 + 2OH^–\)

Anode : \(2Cl^– → Cl_2 +2e\)

\(NaOH\) is crystallised from the remaining part of electrolyte.

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