Four successive members of the first row transition elements listed below with atomic numbers. Which one of them is expected to have the highest Em3+/m2+° value?

Question

Four successive members of the first row transition elements listed below with atomic numbers. Which one of them is expected to have the highest Em3+/m2+° value? (A) Cr(Z = 24) (B) Mn (Z = 25) (C) Fe (Z = 26) (D) Co (Z = 27)

Tardigrade Admin · Accepted Answer

SRP value normally increases from left to right in the period of

d

-block elements. Some SRP value are exceptionally higher due to stability of product ion. e.g.

E_{M n^{3 +} / M n^{2 +}}^{\circ} = + 1.57 V; E_{C o^{3 +} / C o^{2 +}}^{\circ} = + 1.97 V

Thus,

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

is highest for

C o

.

Q. Four successive members of the first row transition elements listed below with atomic numbers. Which one of them is expected to have the highest $E_{m^{3 +} / m^{2 +}}^{\circ}$ value?

$C r (Z = 24)$

$M n (Z = 25)$

$F e (Z = 26)$

$C o (Z = 27)$

Q. Four successive members of the first row transition elements listed below with atomic numbers. Which one of them is expected to have the highest Em3+/m2+∘​ value?

Cr(Z=24)

Mn(Z=25)

Fe(Z=26)

Co(Z=27)

SRP value normally increases from left to right in the period of d-block elements. Some SRP value are exceptionally higher due to stability of product ion. e.g. EMn3+/Mn2+∘​=+1.57V;ECo3+/Co2+∘​=+1.97V Thus, EM3+/M2+∘​ is highest for Co.

Q. Four successive members of the first row transition elements listed below with atomic numbers. Which one of them is expected to have the highest $E_{m^{3 +} / m^{2 +}}^{\circ}$ value?

$C r (Z = 24)$

$M n (Z = 25)$

$F e (Z = 26)$

$C o (Z = 27)$