Among the trihalides of nitrogen, the least basic is:

N F_{3}

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N C l_{3}

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N B r_{3}

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N I_{3}

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Solution

The correct option is A $N F_{3}$
Due to greater electronegativity of $F$ , $N F_{3}$ will be least basic trihalides among the four. Positive charge next to highly electronegative atom is least stable.

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