Consider the half-cell reduction reaction {\Mn}^{2+}+2 e^{-} \to{\Mn}, \E^\circ=-1.18 {\V} {\Mn}^{2+} \to{\Mn}^{3+}+e^{-}, \E^\circ=-1.51 {\V} The \E^\circ for the reaction 3 {\Mn}^{2+} \to{\Mn}^{0}+2 {\Mn}^{3+} and possibility of the forward reaction are respectively (Karnataka NEET 2013)

Correct Answer is : −2.69V and no.

Class 12 NEET Chemistry Electrochemistry Questions

Question : 37 of 74

Marks: +1, -0

Consider the half-cell reduction reaction
Mn2++2e−→Mn, E°=−1.18V
Mn2+→Mn3++e−, E°=−1.51V
The E° for the reaction
3Mn2+→Mn0+2Mn3+
and possibility of the forward reaction are respectively

(Karnataka NEET 2013)

−4.18V and yes
+0.33V and yes
+2.69V and no
−2.69V and no.

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