For the electrochemical cell, `(M)|M^(+))||(X^(-)|X)`.
`E^(@)(M^(+)//M)=0.44V` and `E^(@)(X//X^(-))=0.33V`.
From this data one can deduce that

Options

A. ` M + X to M^ ( + ) + X^ ( -) ` is the sponthaneous reaction
B. `M^(+)+X^(-)to M+X` is the spontaneous reaction
C. `E_("cell")=0.77V`
D. `E_("cell)=-0.77V`

Answer

B

Explanation

`M^(+)+X to M+X` is spontaneous because for the cell represented by `M|M'||X|X`, the value of `E^(@)` is positive i.e. (0.44-0.33)V=0.11V