NEET UG CHEMISTRY MCQ: ELECTRO CHEMISTRY

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The

E_{{M^{3 + }}/{M^{2 + }}}^ \circ

values for Cr, Mn, Fe and Co are -0.41 V, +1.57 V, +0.77 V and +1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?

View answer and explanation

Correct option: A

Option A (Cr) is correct because the most negative

E_{{M^{3 + }}/{M^{2 + }}}^ \circ

value indicates the easiest oxidation of

M^{2+}

M^{3+}

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