jee_main_2026_24_january_morning - Electrochemistry Topics

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QUESTION #71 Faraday's Laws of Electrolysis
Electricity is passed through an acidic solution of Cu²⁺ till all the Cu²⁺ was exhausted, leading to the deposition of 300 mg of Cu metal. However, a current of 600 mA was continued to pass through the same solution for another 28 minutes by keeping the total volume of the solution fixed at 200 mL. The total volume of oxygen evolved at STP during the entire process is ____ mL. (Nearest integer) [Given : Cu²⁺(aq)+2e⁻ arrow Cu(s) Ered⁰ = +0.34 V O₂(g)+4H^++4e⁻ arrow 2H₂O Ered⁰ = +1.23 V Molar mass of Cu = 63.54 g mol⁻¹ Molar mass of O₂ = 32 g mol⁻¹ Faraday Constant = 96500 C mol⁻¹ Molar volume at STP = 22.4 L ]
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