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Q.

Least basic trihalide of Nitrogen is

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a

${NCl}_{3}$

b

${NF}_{3}$

c

${NBr}_{3}$

d

${NI}_{3}$

answer is B.

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Detailed Solution

Key B

${NF}_{3}$

Electron with drawing tendency of fluorine makes ${NF}_{3}$ less lewis basic

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