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JEE Main levelOne or more correct optionsDifficulty 2 of 3cc074

Select the species that have exactly two unpaired electrons (tetrahedral for the chlorido complex).

A $[Ni (CN) X_{4}] X^{2 -}$ (square planar)
B $[V (H X_{2} O) X_{6}] X^{3 +}$
C $[Ti (H X_{2} O) X_{6}] X^{2 +}$
D $[NiCl X_{4}] X^{2 -}$

Answer: B, C, D

Ni(II) is

d^{8}

: tetrahedral

e^{4} t_{2}^{4}

has 2 unpaired. V(III) is

d^{2}

, 2 unpaired. Ti(II) is

d^{2}

, 2 unpaired. Square planar

d^{8}

Ni(II) has 0 unpaired electrons.

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