Which of the following complexes will show maximum paramagnetism?

3 d^{4}

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3 d^{5}

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3 d^{6}

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3 d^{7}

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Solution

The correct option is B $3 d^{5}$
Among high spin complexes, $3 d^{5}$ will show maximum paramagnetism as it has maximum number of unpaired electrons.
High spin $3 d^{4}$ , $3 d^{5}$ , $3 d^{6}$ and $3 d^{7}$ have 4, 5, 4 and 3 unpaired electrons respectively.

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The d - electron configurations of $M n^{2 +}, F e^{2 +}, C o^{3 +}, a n d N i^{2 +} a r e 3 d^{5}, 3 d^{6}, 3 d^{6}, 3 d^{8},$ respectively. Which of the following aqua complexes will exhibit the minimum paramagnetic behavior?

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The $d$ electron configuration of $C r^{2 +}, M n^{2 +}, F e^{2 +}$ and $N i^{2 +}$ are $3 d^{4}, 3 d^{5}, 3 d^{6}$ and $3 d^{8}$ respectively. Which one of the following aqua complexes will exhibit the maximum paramagnetic behaviour?

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Which of the following complexes will show maximum paramagnetism?

The correct option is B 3d5Among high spin complexes, 3d5 will show maximum paramagnetism as it has maximum number of unpaired electrons.High spin 3d4, 3d5, 3d6 and 3d7 have 4, 5, 4 and 3 unpaired electrons respectively.

The correct option is B $3 d^{5}$
Among high spin complexes, $3 d^{5}$ will show maximum paramagnetism as it has maximum number of unpaired electrons.
High spin $3 d^{4}$ , $3 d^{5}$ , $3 d^{6}$ and $3 d^{7}$ have 4, 5, 4 and 3 unpaired electrons respectively.