Based on the following equilibria: Fe^ 2+ Fe^ 3+ +e^-; E^ =-0.771 V [Fe(CN)_6]^ 4- [Fe(CN)_6]^ 3- +e^-; E^ =-0.36 V Select the correct statements

JEE Main Chemistry question

Based on the following equilibria: [Fe(CN)_6]^{4-}\rightleftharpoons[Fe(CN)_6]^{3-}+e^-;\ E^\circ=-0.36\ V Select the correct statements

(A)Iron in state is more stable than in state
(B)Unstable ion can be stabilized by complexing it with a suitable ligand
(C)Both (a) and (b)Correct
(D)None of the above are correct statements

Answer: (C)

Solution

The strongly negative for oxidation of free shows that is thermodynamically favoured over , confirming statement (a). On complexing with , the oxidation potential becomes less negative ( V

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Question ID VK-147493