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Question

Pt (H2) | H+(pH=2) | H+(pH=3) | Pt (H2)
1 atm 1 atm
The cell reaction for the given cell is:

A
spontaneous
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B
non-spontaneous
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C
at equilibrium
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D
None of these
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Solution

The correct option is B non-spontaneous
Ecell=E0cell0.0591n log10[H+]anode[H+]cathode

This is a special type of cell in which we have E0=0 because same type of species/ions are present in cathode and anode. It is called a concentration cell.
= 0.05911 log10102103= 0.0591
=ve
Since Ecell is negative, reaction is non-spontaneous as G is+ve

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