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Secondary Cells

Assertion: Th...

Question

Assertion: The density of $H_{2} S O_{4}$ decreases in lead storage cell during discharging.
Reason: Calomel electrode is a reference electrode and it is better than hydrogen electrode.

A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

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B

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

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C

Assertion is true but Reason is false

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D

Assertion is false but Reason is true

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E

Both Assertion and Reason are false

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Solution

The correct option is B Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
The density of $H_{2} S O_{4}$ decreases in lead storage cell during discharging (as it is consumed) and increases during recharging (as it is regenerated). The calomel electrode is a secondary reference electrode and it is better than hydrogen electrode. It is a metal sparingly soluble salt electrode.

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