Published by:
CGP EDU Academic Team
Published on: August 11, 2026
In the given electrochemical cell, 
at 298 K , the cell potential 
will increase when :
A
Concentration of 
is increased.
and (E) Only
is increased. and (E) Only
B
Concentration of 
is decreased.
Only
is decreased. Only
C
Concentration of 
is decreased.
is decreased. D
Concentration of 
is increased.
(E) Concentration of
is increased. Choose the correct answer from the options given below:
and (E) Only
A and B Only
is increased. (E) Concentration of
is increased. Choose the correct answer from the options given below: and (E) Only
A and B Only
Text Solution
Verified by ExpertsThe correct answer is:
C
The cell 
has the reaction:
Using Nernst equation:
where 
For 
to increase, Q must decrease. Analyzing each condition:
Increase 
increases Q , decreases 
- false
Decrease 
increases Q (smaller denominator), decreases 
- false
Decrease 
decreases Q , increases 
- true
Increase 
decreases Q , increases 
- true
(E) Increase 
decreases Q , increases 
- true
Therefore C, D, and E cause 
to increase.
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