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NEET levelSingle correct optionDifficulty 1 of 3df114

Which of the following ions is diamagnetic?

A $V X^{3 +}$
B $Ti X^{4 +}$
C $Cr X^{3 +}$
D $Mn X^{2 +}$

Answer: B

Ti X^{4 +}

is

3 d^{0}

, so it has no unpaired electron.

V X^{3 +}

(

3 d^{2}

),

Cr X^{3 +}

(

3 d^{3}

) and

Mn X^{2 +}

(

3 d^{5}

) have 2, 3 and 5 unpaired electrons and are paramagnetic.

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