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Reduction potential of chlorine electrode will be highest at 298K and 1 bar pressure of Chlorine when Platinum electrode is immersed in

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By Expert Faculty of Sri Chaitanya
a
0.1M HCl
b
0.01M HCl
c
0.001M HCl
d
1M HCl
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detailed solution

Correct option is C

The reduction reaction involved is: Cl2+2e-1→2Cl-1; QR=[Cl-1]2PCl2 Nernst equation for the electrode potential is E=E0-2.303RTnFlog10QR=E0-0.05912log10[Cl-1]PCl2 Lower the concentration of [Cl-1], greater will be the electrode potential.In general, reduction potential of non-metal electrode increases with decrease in the concentration of electrolyte. Hence, reduction potential of chlorine electrode is highest when inert Pt electrode is immersed in 0.001M HCl.

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