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Asked by  | 31st Dec, 2009, 05:54: PM

Expert Answer:

statement a is ambiguous as it is not mentioned clearly that whether the trend is reducing power or reducing agent order.

(M / M2+)           Fe = 0.44 V    Co = 0.28 V     Ni = 0.25 V

Since the the oxidation potential of Fe / Fe2+ is the highest, it has the greatest tendency to oxidise itself and hence reduce other.

So, if we take it as reducing agent,

the order will be Fe2+ > Co2+ > Ni2+

And if we take the reducing power,

the order will be Fe2+ < Co2+ < Ni2+

Hence, option c is the correct option.

 

Answered by  | 5th Jan, 2010, 10:53: AM

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