In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?
- NaOH
- NaCl
- Na metal
- \(Na_2CO_3\)
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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