The isoelectronic pair of ions is:

{S c}^{2 +}

and

V^{3 +}

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{M n}^{3 +}

and

{F e}^{2 +}

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{M n}^{2 +}

and

{F e}^{3 +}

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{N i}^{3 +}

and

{F e}^{2 +}

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Solution

The correct option is C ${M n}^{2 +}$ and ${F e}^{3 +}$

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Similar questions

Q. Consider the ions

F e^{2 +}, F e^{3 +}, C r^{2 +}, C r^{3 +}, M n^{2 +}, M n^{3 +}

. Strongest oxidizing ion is ?

Q. Consider the ions

F e^{2 +}, F e^{3 +}, C r^{2 +}, C r^{3 +}, M n^{2 +}, M n^{3 +}

. Strongest reducing ion is ?

While $F e^{3 +}$ is stable, $M n^{3 +}$ is not stabe in acid solution because:
$(M n^{3 +} + e^{-} \to M n^{2 +}, E^{\circ} = 1.5 V; O_{2} + 4 H^{+} + 4 e^{-} \to 2 H_{2} O, E^{\circ} = + 1.23 V; F e^{3 +} + e^{-} \to F e^{2 +}, E^{\circ} = 0.77 V)$

Q. Give reasons.

E^{o}

value for

M n^{3 +} / M n^{2 +}

couple is much more positive than that for

F e^{3 +} / F e^{2 +}

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The isoelectronic pair of ions is:

The correct option is C Mn2+ and Fe3+

The correct option is C ${M n}^{2 +}$ and ${F e}^{3 +}$