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Question

Consider the cell:
Zn|Zn2+(aq)(1.0M)||Cu2+(aq)(1.0M)||Cu
The standard reduction potential are 0.350 V for;
Cu2+(aq)+2eCu and -0.763 V for;
Zn2+(aq)+2eZn.
Assertion: The reaction is spontaneous.
Reason: The cell potential is positive.

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 A Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Zn|Zn2+(aq)(1.0M)||Cu2+(aq)(1.0M)||Cu
As we know,
E=EcathodeEanode=0.35(0.76)=1.1V
as it is positive so its a spontaneous reaction.

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