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Which is more basic and why ? NF3 or NH3...

Which is more basic and why ? `NF_3` or `NH_3`.

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`NH_3` is more basic than `NF_3`.

In `NF_3, N` is less electronegative than `F`, hence bond pair shifts more towards `F`, thereby `delta` positive charge density on `N` increases, hence tendency to donate electron decreases. In `NH_3, N` is more electronegative than `H`, hence bond pair shifts towards `N` in `N-H`, thereby negative charge density on `N` increases, hence tendency to donate electrons increases. Hence `NH_3` is more basic as compared to `NF_3`.
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