Consider the cell: Zn|Zn2+(aq)(1.0M)||Cu2+(aq)(1.0M)||Cu The standard reduction potential are 0.350 V for; Cu2+(aq)+2e−→Cu and -0.763 V for; Zn2+(aq)+2e−→Zn.
Assertion: The reaction is spontaneous.
Reason: The cell potential is positive.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Assertion is true but Reason is false
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
Assertion is false but Reason is true
Both Assertion and Reason are false
A
Assertion is false but Reason is true
B
Assertion is true but Reason is false
C
Both Assertion and Reason are false
D
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
E
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
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Solution
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Zn|Zn2+(aq)(1.0M)||Cu2+(aq)(1.0M)||Cu As we know, E=Ecathode−Eanode=0.35−(−0.76)=1.1V as it is positive so its a spontaneous reaction.
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Similar Questions
Q1
Consider the cell: Zn|Zn2+(aq)(1.0M)||Cu2+(aq)(1.0M)||Cu The standard reduction potential are 0.350 V for; Cu2+(aq)+2e−→Cu and -0.763 V for; Zn2+(aq)+2e−→Zn.
Assertion: The reaction is spontaneous.
Reason: The cell potential is positive.
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Q2
Consider the cell: Zn|Zn2+(aq)(1.0M)||Cu2+(aq)(1.0M)||Cu The standard reduction potential are 0.350 V for Cu2+(aq)+2e−→Cu and −0.763 V for Zn2+(aq)+2e−→Zn
The cell reaction is:
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Q3
Consider the cell: Zn|Zn2+(aq)(1.0M)||Cu2+(aq)(1.0M)||Cu The standard reduction potential are 0.350 V for Cu2+(aq)+2e−→Cu and -0.763 V for Zn2+(aq)+2e−→Zn.
The EMF (in V) of the cell is ( write your answer as nearest integer) :
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Q4
Consider the cell,
Zn|Zn2+(aq)(1.0M)||Cu2+(aq)(1.0M)|Cu
The standard reduction potentials are +0.35V for 2e−+Cu2+(aq)→Cu2+(aq)(1.0M)|Cu
The standard reduction potentials are +0.35V for 2e−+Cu2+(aq)→Cu and −0.763V for 2e−+Zn2+(aq)→Zn
Calculate the emf of the cell and tell whether the cell reaction spontaneous or not ?
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Q5
Assertion: C4 – photosynthetic pathway is more efficient than C3 pathway Reason: Photorespiration is suppressed in C4 plants