Relationship between Cell Potential and Gibbs Energy Change NEET Questions

Physical Chemistry - Redox Reactions and Electrochemistry
Relationship between Cell Potential and Gibbs Energy Change

Relationship between Cell Potential and Gibbs Energy Change MCQ Questions


1.
The relationship between standard Gibbs free energy change (ΔG°) and standard cell potential (E°_cell) is:
A.
ΔG° = −nFE°_cell
B.
ΔG° = −n E°_cell / F
C.
ΔG° = nFE°_cell
D.
ΔG° = −F E°_cell / n
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ANSWER :
A. ΔG° = −nFE°_cell
2.
For a non-standard state cell, the relation between ΔG and E_cell is:
A.
ΔG = nFE_cell
B.
ΔG = nFE_cell / RT
C.
ΔG = −nFE°_cell
D.
ΔG = −nFE_cell
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ANSWER :
D. ΔG = −nFE_cell
3.
In ΔG° = −nFE°_cell, the symbol F represents:
A.
Frequency factor
B.
Free energy
C.
Faraday's constant = 96485 C mol⁻¹
D.
Force
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ANSWER :
C. Faraday's constant = 96485 C mol⁻¹
4.
In the equation ΔG° = −nFE°_cell, 'n' refers to:
A.
Number of moles of electrolyte
B.
Number of electrons exchanged in the balanced cell reaction
C.
Number of half-cells
D.
Number of ions in solution
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ANSWER :
B. Number of electrons exchanged in the balanced cell reaction
5.
The maximum amount of electrical work that can be obtained from a galvanic cell at constant T and P equals:
A.
+nFE_cell
B.
−nFE_cell
C.
−ΔS
D.
+RT ln K
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ANSWER :
A. +nFE_cell
6.
If E°_cell is positive, then ΔG° is:
A.
Cannot be determined
B.
Positive
C.
Negative
D.
Zero
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ANSWER :
C. Negative
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