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Which is the least basic trihalide of nitrogen?

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in Chemistry – Class 12 by (188k points)
Which is the least basic trihalide of nitrogen?

(a) NI3

(b) NBr3

(c) NCl3

(d) NF3

The question was asked during an interview.

My query is from P-Block Elements in chapter P-Block Elements of Chemistry – Class 12

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Best answer
The correct option is (d) NF3

Best explanation: NF3 is the least basic trihalide of nitrogen because it has different size and the bond ismorepolar towards nitrogen as it is more electronegative than the remaining halides, which makes electron availabilitymoreon nitrogen(in NF3) than the remaining halides. Thus, it can donate electrons easily and therefore NF3 is least basic.

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