MHT CET 2026 Chemistry question

What is the change in oxidation number of Pb at positive electrode of lead accumulator acting as galvanic cell ?

(A)increases by 1
(B)decreases by 1
(C)increases by 2
(D)decreases by 2Correct

Answer: (D)

Solution

When the lead accumulator discharges (acts as a galvanic cell), the positive electrode (cathode) is and the reaction is . Oxidation number of Pb in is

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Question ID VK-099996