Same chapter3 marksDifficulty: Medium
Calculate the mass of copper deposited when a current of 2 A is passed through copper sulphate solution for 30 minutes. (Cu = 63.5, F = 96,500 C)
Electrochemistry
3 marksDifficulty: Medium
Distinguish between a galvanic cell and an electrolytic cell.
Original Khojo Papers practice question — not from a past board paper.
Answer
A galvanic cell converts chemical energy into electrical energy through a spontaneous redox reaction, and its anode is negative. An electrolytic cell uses electrical energy to drive a non-spontaneous reaction, and its anode is positive. In both, oxidation occurs at the anode and reduction at the cathode.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A rechargeable battery works as a galvanic cell when discharging and as an electrolytic cell when charging.
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