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Which of the following is the voltage output of a mercury cell?

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in Chemistry – Class 12 by (188k points)
Which of the following is the voltage output of a mercury cell?

(a) 1.55V

(b) 1.35V

(c) 2.55V

(d) 1V

The question was asked in semester exam.

This interesting question is from Electrochemistry topic in chapter Electrochemistry of Chemistry – Class 12

1 Answer

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Right answer is (b) 1.35V

To explain I would say: Mercury batteries use a reaction between mercuric oxide and zinc in an alkaline electrolyte to produce electricity. Its voltage during discharge is a constant 1.35V. The common dry cell, on the other hand, provides a voltage of 1.5V.

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