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Order of Reaction

The EM3+/ M...

Question

The $E_{M^{3 +} / M^{2 +}}^{\circ}$ values of $C r, M n, F e$ and $C o$ are $- 0.41, + 1.57, + 0.77$ and $+ 1.97 V$ , respectively. For which one of these metals the change in oxidation state from $+ 2$ to $+ 3$ is easiest?

C r

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M n

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F e

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C o

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Solution

The correct option is A $C r$
$E_{C r^{3 +} / C r^{2 +}}^{\circ} = - 0.41 V$
$E_{M n^{3 +} / M n^{2 +}}^{\circ} = + 1.57 V$
$E_{F e^{3 +} / F e^{2 +}}^{\circ} = + 0.77 V$
$E_{C o^{3 +} / C o^{2 +}}^{\circ} = + 1.9$
More negative value of $E_{r e d}^{\circ}$ indicates better reducing agent, then easily oxidised. Thus, oxidation of $C r^{2 +}$ to $C r^{3 +}$ is the easiest.

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Similar questions

The $E {^{0}}_{M^{3 +} / M^{2 +}}$ values for Cr, Mn, Fe and Co are -0.41, + 1.57, + 0.77 and + 1.97V respectively.For which one of these metals the change oxidation state from +2 and +3 is easily?

Q. The

_{M^{3 +} / M^{2 +}}^{o}

values for Cr, Mn, Fe and Co are

- 0.41, + 1.57, + 0.77

and

+ 1.97

V respectively. For which one of these metals the change in oxidation state from

+ 2

+ 3

is easiest?

Q. The

E_{M^{3 +} / M^{2 +}}^{o}

values for

C r

M n

F e

and

C o

are

- 0.41

+ 1.57

, +

0.77

and +

1.97

respectively. For which one of following metal the change in oxidation state from +2 to +3 is easiest?

For the four successive transition elements (Cr, Mn, Fe and Co), what is the order of stability of their +2 states?

(At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

Q. The correct order of

E^{0} M^{2 +} / M

values with negative sign for the four successive elements Cr, Mn, Fe and Co is

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The E∘M3+/M2+ values of Cr,Mn,Fe and Co are −0.41,+1.57,+0.77 and +1.97 V, respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?

The correct option is A CrE∘Cr3+/Cr2+=−0.41 VE∘Mn3+/Mn2+=+1.57 VE∘Fe3+/Fe2+=+0.77 VE∘Co3+/Co2+=+1.9More negative value of E∘red indicates better reducing agent, then easily oxidised. Thus, oxidation of Cr2+ to Cr3+ is the easiest.

The $E_{M^{3 +} / M^{2 +}}^{\circ}$ values of $C r, M n, F e$ and $C o$ are $- 0.41, + 1.57, + 0.77$ and $+ 1.97 V$ , respectively. For which one of these metals the change in oxidation state from $+ 2$ to $+ 3$ is easiest?