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AP EAMCET2003Chemistryp Block Elements (Group 15, 16, 17 & 18)

The product obtained at anode when 50 % H ₂ SO ₄ aqueous solution is electrolysed using platinum electrodes is :

Options

  1. AH ₂ SO ₃
  2. BH ₂ ~S ₂ O ₈
  3. CO ₂
  4. DH ₂

Correct answer

B. H ₂ ~S ₂ O ₈

Step-by-step solution

50 % H ₂ SO ₄ aqueous solution can be electrolysed by using Pt electrodes as 2 H ₂ SO ₄ 2 HSO ₄⁻+2 H ⁺2 HSO ₄⁻ H ₂ ~S ₂ O ₈+2 e⁻ (at anode)

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