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Assertion: The cell potential of mercury...

Assertion: The cell potential of mercury cell is 1.35V which remains constant.
Reason: In mercury cell, the electrolyte is a paste of KOH and ZnO.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
B
Assertion: The cell reaction `Zn(s)+ HgO(s) rarr ZnO(s)+ Hg(l)`
The cell potential remains constant during its life as the overall reaction does not involve any ion in solution whose concentration changes during its life time. Reason: The electrolyte is a paste of KOH and ZnO. Reason is true but not the correct explanation of assertion.
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The questions consist of two atatements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses : The cell potential of mercury cell is 1.35 V , which remains constant . In mercury cell, the electrolute is a paste of KOH and ZnO.

The questions consist of two atatements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses : The cell potential of mercury cell is 1.35 V which remanins constant. In mercury cell, the electrolyte is a passte of KOH and HgO .

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