Q.

Correct order of bond angles for the following is

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a

NH3>PCl3>BCl3

b

BCl3>CH4>PCl3

c

BCl3>PCl3>NH3

d

PCl3>BCl3>NH3

answer is B.

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Detailed Solution

BCl3​ is sp2 hybridized CH4​ is sp3 hybridized PCl3​ is sp3 hybridized. As the character of p is more the bond angle of central atom is less.However CH4​ and PCl3​ are having same p character but the lone pair on PCl3​ reduces the regular bond angle. So the correct order is BCl3​>CH4​>PCl3​
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