Amongst the following trihalides,which one is | vedclass

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(A) The basicity of nitrogen trihalides $(NX_3)$ depends on the availability of the lone pair on the nitrogen atom for donation.In $NF_3$,the fluorine

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$NF_3$

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(A) The basicity of nitrogen trihalides $(NX_3)$ depends on the availability of the lone pair on the nitrogen atom for donation.In $NF_3$,the fluorine atom is highly electronegative. It pulls the electron density of the $N-F$ bond towards itself,which in turn increases the effective electronegativity of the nitrogen atom.This makes the lone pair on the nitrogen atom in $NF_3$ much less available for donation compared to other nitrogen trihalides.As the electronegativity of the halogen decreases from $F$ to $I$,the electron density on the nitrogen atom increases,making the lone pair more available for donation.Therefore,the basicity order is $NF_3 Thus,$NF_3$ is the least basic.

Amongst the following trihalides,which one is least basic?

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