The correct statement(s) about {Cr}²+}\;{and}\;{Mn}³+} is (are) [Atomic numbers of Cr=24 and Mn=25] [JEE Adv 2015 P1]

Both {Cr}²+}{ and }{Mn}³+} exhibit d^4 elctronic configuration

When {Cr}²+} is used as a reducin agent.the chromium ion attains d^5 electronic configuration

Test Index

d and f block elements

Section: Chemistry

Question : 17 of 24

Marks: +1, -0

\mathrm{Cr}^{2+}\;\text{and}\;\mathrm{Mn}^{3+}

$\mathrm{Cr}^{2+}$ is a reducing agent
$\mathrm{Mn}^{}3+$ is an oxidizing agent
Both $\mathrm{Cr}^{2+}\text{ and }\mathrm{Mn}^{3+}$ exhibit $d^4$ elctronic configuration
When $\mathrm{Cr}^{2+}$ is used as a reducin agent.the chromium ion attains $d^5$ electronic configuration

Solution:

(1)

\mathrm{Cr}^{2+}

is a reducing agent because

\mathrm{Cr}^{3+}

is more stable

(2)

\mathrm{Mn}^{3+}

is an oxidizing agent because

\mathrm{Mn}^{2+}

is more stable

(3)

\mathrm{Cr}^{2+}\text{ and }\;\mathrm{Mn}^{3+}

exhibit

d^4

electronic configuration

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