Q.

The M–O–M bond angles in M2O (where M is halogen) is in the order

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a

Br2O > Cl2O > F2O

b

F2O >Br2O >Cl2O

c

F2O > Cl2O > Br2O

d

Cl2O > F2O >Br2O

answer is A.

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Detailed Solution

Br2O > Cl2O > F2O. Bond angle decreases because the  electronegitivity of halogen atom increases and halogen atom pulls the bonded electrons towards itself hence bond pair-bond pair repulsions decreases ,bond angle decreases.
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