Question
Identify electron rich, electron precise, electron deficient out of these
$\text{B}_2\text{H}_6,\text{NH}_3,\text{H}_2\text{O,}\text{CH}_4$

Answer

Electron deficient: $\mathrm{B}_2 \mathrm{H}_6$
Electron rich the following: $\mathrm{H}_2 \mathrm{O}$ and $\mathrm{NH}_3$
Electron precise: $\mathrm{CH}_4$

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