Q.

For the electrochemical cell, MM+XX 
 EM+/Mo=0.44V and EX/X-o=0.33V From this data one can deduce that 

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a

M+XM++Xis the spontaneous reaction

b

M++XM+Xis the spontaneous reaction 

c

Ecell =0.77V

d

Ecell =0.77V

answer is B.

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Detailed Solution

 For, M++XM+X,Ecell o=0.440.33=0.11V 
is positive, hence reaction is spontaneous. 

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