1.

Although `Cr^(3+)` and `Co^(2+)` ions have same number of unpaired electrons but the magnetic moment of `Cr^(3+)` is `3.87 B.M`. and that of `Co^(2+)` `4.87` B.M. because….A. They have different no. of d electronsB. They have same electronic but different orbital contributionC. They have different electronic but same orbital contrigurationD. they are typical elements.

Answer» Correct Answer - B


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