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JEE Main 202224 JuneEvening Shift
Exam
JEE Main
Year
2022
Date
24 June
Shift
Evening Shift
Subject
Chemistry
Chapter
Electrochemistry

JEE Main 2022 · 24 June · Evening Shift · Chemistry · Electrochemistry

In the industrial production of which of the following, molecular...

In the industrial production of which of the following, molecular hydrogen is obtained as a bye product.

Options

  1. ANa2CO3{Na}_{2}{CO}_{3}
  2. BNaOHNaOH
  3. CNaNa metal
  4. DNaHCO3{NaHCO}_{3}

Correct answer

B. NaOHNaOH

Step-by-step solution

NaOHNaOH is produced in Nelson cell using Brine solution.

Reaction taking place will be

Cathode: 2H2O+2e−→H2+2OH−2{H}_{2}O + 2{e}^{-} \to {H}_{2} + 2{OH}^{-}

Anode: 2Cl−→Cl2+2e−2{Cl}^{-} \to {Cl}_{2} + 2{e}^{-}

In solution Na++OH−→NaOH{Na}^{+} + {OH}^{-} \to NaOH

So, H2{H}_{2} gas is released at cathode during preparation of NaOHNaOH.

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