Which of the following ions is diamagnetic ?

B e E t_{2}

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A l M e_{3}

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B_{2} H_{6}

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S i (C H_{3})_{4}

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Solution

The correct options are
A $B_{2} H_{6}$
B $S i (C H_{3})_{4}$
C $B e E t_{2}$
D $A l M e_{3}$
In $B e E t_{2}$ , $A l M e_{3}$ , $B_{2} H_{6}$ and $S i (C H_{3})_{4}$ , all electrons are paired and are dimagnetic in nature. In $S i (C H_{3})_{4}$ , $S i$ and $C$ have $4$ valency electrons each. They form $4$ covalent bonds with $4$ other atoms. Hence, all electrons are paired. This results in diamagnetism.

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