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Q.

The correct order of increasing bond angles is

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a

PF3 < PBr3 < PCl3 < PI3

b

PF3 < PCl3 < PBr3 < PI3

c

PI3 < PBr3 < PCl3 < PF3

d

PF3 > PCl 3 < PBr3 < PI3

answer is A.

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Detailed Solution

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Bond angle is inversely proportional to the electronegativity of the side atom. Higher the electronegativity of the side atom lesser is the bond angle.

Hence the order of bond angles is, PF3 < PCl3 < PBr3 < PI3

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