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Most Important Selected Qs for JEE AdvancedChemistryElectrochemistry

The total volume of gases liberated at S.T.P. when a charge of 2 F is passed through aqueous solution of sodium phosphate using inert electrode is:

Options

  1. A44.8 L
  2. B22.4 L
  3. C33.6 L
  4. D11.2 L

Correct answer

C. 33.6 L

Step-by-step solution

H ₂ and O ₂ are produced at cathode and anode respectively. At cathode: 2 H ₂ O +2 e ⁻ H ₂+2 OH ⁻2 ~F 1 ~mol At anode: array r 2 H ₂ O O ₂+4 H ⁺+4 e ⁻ 1 2 ~mol 2 ~F array aligned Total volume of gases & =22.4 ~L H ₂ & +11.2 ~L O ₂ 33.6 ~L aligned

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