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NEET2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

On electrolysis of dil. sulphuric acid using Platinum Pt electrode, the product obtained at anode will be

Options

  1. AOxygen gas
  2. BH 2 S gas
  3. CSO 2 gas
  4. DHydrogen gas

Correct answer

A. Oxygen gas

Step-by-step solution

Dissociation of sulfuric acid, ( H ₂ SO ₄ 2 H ⁺( aq )+ SO ₄⁻²( aq ) ) Disssociation of water, ( H ₂ O H ⁺( aq )+ OH ⁻( aq ) ) At Anode: (4 OH ⁻ 2 H ₂ O ⁺( l )+ O ₂( ~g )+4 e ⁻ ) At Cathode: (2 H ⁺( aq )+2 e ⁻ H ₂( ~g ) )

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