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Question

The reaction
1/2H2(g)+AgCl(s)H(aq)+Cl(aq)+Ag(s) occurs in the galvanic cell:

A
Ag|AgCl(s)|KCl(sol)|AgNO3|Ag
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B
Pt|H2(g)|HCl(sol)|AgNO3(sol)|Ag
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C
Pt|H2(g)|HCl(sol)|AgCl(s)|Ag
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D
Pt|H2(g)|KCl(sol)|AgCl(s)|Ag
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Solution

The correct option is A Pt|H2(g)|HCl(sol)|AgCl(s)|Ag
12Hg2(g)+AgCl(s)H(aq)+Cl(aq)+Ag(s)
There is oxidation of hydrogen and reduction of silver; therefore, it occurs in the following cell:
Pt|H2(g)|HCl(sol)|AgCl(s)|Ag

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