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Question

For the following electrochemical cell at 298 K,
Pt(s)|H2(g,1bar)|H+(aq,1M)||M4+(aq),M2+(aq)|Pt(s)
Ecell=0.092V when[M2++(aq)][M4+(aq)]=10x
Given:EM4+/M2+=0.151V;2.303RTF=0.059V
The value of x is

A
-2
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B
-1
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C
1
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D
2
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