Relationship between Cell Potential and Gibbs Energy Change NEET Questions

Physical Chemistry - Redox Reactions and Electrochemistry

Relationship between Cell Potential and Gibbs Energy Change MCQ Questions


1.
The relationship between standard Gibbs free energy change and standard cell potential is given by
A.
ΔG° = -nFE°cell
B.
ΔG° = nFE°cell
C.
ΔG° = -E°cell/nF
D.
ΔG° = -RTlnK
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ANSWER :
A. ΔG° = -nFE°cell
2.
If E°cell is positive, what can be inferred about ΔG°?
A.
ΔG° is positive
B.
ΔG° is zero
C.
ΔG° is negative
D.
ΔG° is undefined
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ANSWER :
C. ΔG° is negative
3.
What does a negative ΔG indicate about a redox reaction?
A.
It is non-spontaneous
B.
It is at equilibrium
C.
It is spontaneous
D.
It is reversible
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ANSWER :
C. It is spontaneous
4.
In the equation ΔG = -nFEcell, 'n' represents
A.
Number of electrons lost in anode
B.
Number of electrons gained in cathode
C.
Number of moles of electrons transferred in the reaction
D.
Number of atoms oxidized
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ANSWER :
C. Number of moles of electrons transferred in the reaction
5.
What is the SI unit of Gibbs free energy?
A.
kJ/mol
B.
J/mol
C.
cal/mol
D.
kcal/mol
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ANSWER :
B. J/mol
6.
If the emf of a cell is zero, the value of Gibbs free energy is
A.
Maximum
B.
Zero
C.
Negative
D.
Positive
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ANSWER :
B. Zero