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O ₂ gas will be evolved as a product of electrolysis of : (A) an aqueous solution of AgNO ₃ using silver electrodes. (B) an aqueous solution of AgNO ₃ using platinum electrodes. (C) a dilute solution of H ₂ SO ₄ using platinum electrodes. (D) a high concentration solution of H ₂ SO ₄ using platinum electrodes. Choose the correct answer from the options given below :

Options

  1. A(A) and (C) only
  2. B(B) and (C) only
  3. C(A) and (D) only
  4. D(B) and (D) only

Correct answer

B. (B) and (C) only

Step-by-step solution

When an aqueous solution of AgNO ₃ is electrolysed using Pt electrodes Cathode: Ag ⁺( aq )+ e ⁻ Ag ( s ) Anode : 2 H ₂ O ( l ) 4 H ⁺( aq )+ O ₂( ~g )+4 e ⁻ When dilute H ₂ SO ₄ is electrolysed using Pt electrodes When dilute H ₂ SO ₄ is electrolysed using Pt electrodes Anode : 2 H ₂ O ( l ) O ₂( ~g )+4 H ⁺( aq )+4 e ⁻ Cathode: 2 H ⁺( aq )+2 e ⁻ H ₂( ~g )

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