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UPSEE 2019 Solved Paper

Question : 77 of 150

Marks: +1, -0

Which shows highest magnetic moment?

Solution:

Magnetic moment

(\mu)

is calculated as follows:

\mu=\sqrt{n(n+2)}\cdot B M

where,

n=

number of unpaired electrons.

(d)

\mathrm{CO}^{2+}=6+8-2=12

electrons.

Thus, has 4 electrons in 2p-subshell with 2-unpaired electron.

\therefore

\mu=\sqrt{2(2+2)}=\sqrt{8}

Hence,

\mathrm{Mn}^{2+}

has highest magnetic moment and option (b) is the correct answer.

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