Answer :
Feasibility of a redox reaction is decided by the electric potential of the cell made out of two elements. So the net E°cell for the cell should be positive. The relative position of Ag and Fe3+ in electrochemical series and the reduction potential of cell should be determined for all cases.
(i)
The
Since the value is positive the reaction proceeds spontaneously and is feasible.
∴ We can calculate for remaining three reduction potential similarly,
(ii)
(iii)
(iv)
Since the value of potential of cell for Ag and Fe3+ is negative we can say that the reaction is non-spontaneous and is not feasible as the redox reaction resists undergoing changes under mentioned configuration of Ag which undergoes oxidation, as its emf is less as compared to Fe3+, it readily undergoes reduction. Thus reaction in Option (iv) is not feasible.
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NCERT - Chemistry Part-IIIdentify the subs
NCERT - Chemistry Part-IIIdentify the subs
NCERT - Chemistry Part-IIIdentify the subs
NCERT - Chemistry Part-IIUsing the standar
NCERT - Chemistry Part-II