For a cell reaction involving a two-electron change,the standard $EMF$ of the cell is $0.295 \ V$ at $25 \ ^\circ C$. The equilibrium constant of the reaction at $25 \ ^\circ C$ will be:
- A$29.5 \times 10^{-2}$
- B$10$
- C$1 \times 10^{10}$
- D$2.95 \times 10^{-10}$
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