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  9. Q417

RRB Group D (Level-1 posts) 2022 · Question 417 of 598

Which of the following chemical reactions represents the chlor-alkali process?

  1. ANaHCO3 + H+ → CO2 + H2O + Sodium salt of acid
  2. BNaCl + H2O + CO2 + NH3 → NH4Cl + NaHCO3
  3. C2 NaCl (aq) + 2 H2O (l) → 2 NaOH (aq) + Cl2 (g) + H2 (g)Correct
  4. DCa(OH)2 + Cl2 → CaOCl2 + H2O

Answer: C. 2 NaCl (aq) + 2 H2O (l) → 2 NaOH (aq) + Cl2 (g) + H2 (g)

Explanation

The chlor-alkali process involves the electrolysis of brine (NaCl solution), producing NaOH, Cl2, and H2. Therefore, option 3 represents this process.

Source: RRB Group D 2022 Prev. Yr. Paper (18 Aug 2022) (Shift 3) - Prepp · reliable-secondary

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