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Question

Assertion: The density of H2SO4 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 H2SO4 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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