Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: The cell potential of mercury cell is 1.35 V, which remains constant. Reason: In mercury cell, the electrolyte is a paste of \[Ca{{C}_{2}}\] and \[NaCl\].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 the reason is not the correct explanation of the Assertion
C) If Assertion is true but Reason is false
D) If both Assertion and Reason are false
Correct Answer: B
Solution :
\[Zn(l)+Hg(s)\xrightarrow{{}}ZnO(s)+Hg(l)\] 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.
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