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  4. The correct increasing bond angle among BF3, PF3 and ClF3 follow the order

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Q. The correct increasing bond angle among $BF_3, PF_3$ and $ClF_3$ follow the order

Chemical Bonding and Molecular Structure

Solution:

In $BF_3$, $B$ is $sp^2$ hybridised with bond angle $120^{\circ}C$. In $PF_3$, $P$ is $sp^3$ hybridised but bond angle is less than $109^{\circ}28$ due to lone pair bond pair repulsion. In $ClF_3$, $Cl$ is $sp^3d$ hybridised having $T$-shape with bond angle $90^{\circ}C$.