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Question

Which is least basic?

A
NF3
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B
NCI3
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C
NBr3
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D
NI3
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Solution

The correct option is A NF3
N is least dense because F is most electronegative and it will attarct the lone pair of N atom and thus the electrons will the less available for donation.
As the size of hailde ion increases the electronegativity of halide ion decreases and the basic character increases.


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