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Q.

Which cell will measure standard electrode potential of copper electrode?

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a

Pt(s)H2(g,0.1 bar )H+(aq1M)Cu2+(aq,1M)Cu

b

Pt(s)H2(g,1 bar )H(aq,1M)Cu2+(aq,1M)Cu

c

Pt(s)H2(g,1 bar )H+(aq,1M)Cu2+(aq,2M)Cu

d

Pt(s)H2(g,0.1 bar )H+(aq,0.1M)Cu2+(aq,1M)Cu

answer is C.

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Detailed Solution

Standard electrode potential of copper electrode can be calculated by constructing a concentration cell composed of two half-cell reactions in which concentration of species on left hand and right hand side are unity.
In such case cell potential is equal to standard electrode potential.
Pt(s)H2(g,1bar)H+(aq,1M)Oxidation half -cell reaction Cu2+(aq,1M)CuReduction half -cell reaction 

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