Q50 / 150 · MHT CET 2024 (03 May Shift 2) · Chemistry

Which from following lanthanoids exhibits no effective magnetic moment in +3 state?

A
Ce
Correct answer
B
La
C
Gd
D
Eu

Solution

La in +3 state shows $4 \mathrm{f}^0$, electronic configuration, hence has zero effective magnetic moment.

Hence, the correct answer is option: 'B'.

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