MCQ
Amongst the following trihalide, which one is least basic?
- ✓$NF_3$
- B$NCl_3$
- C$NBr_3$
- D$NI_3$
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$A, C$ and $D$ are :-

Reason : Oxygen forms $p\pi \,-\, p\pi $ multiple bond due to small size and small bond length but $p\pi \,-\,p\pi $ bonding is not possible in sulphur.