NEET Chemistry Electrolytic Cells MCQ Question
In an electrolytic cell with copper electrodes and copper sulfate solution, if a constant current of 2 amperes is passed for 1 hour, how many grams of copper will be deposited on the cathode? (Atomic mass of Cu = 63.5 g/mol)
37 g
75 g
19 g
9.50 g
Correct Answer
Detailed Explanation
Using Q = It, where I = 2 A and t = 3600 s, Q = 7200 C. The reaction Cu²⁺ + 2e⁻ → Cu(s) requires 2 moles of electrons (2 * 96485 C/mol). The mass of Cu deposited is (7200 C / 192970 C/mol) * 63.5 g/mol = 4.75 g.
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