The correct decreasing order of nearest bond angle:
(1) CIF 3 > PF3 > NF3 > BF3
(2) BF3 > PF3 > NF3 > CIF:
(3) BF3 > CIF3 > PF3 > NF3
(4) BF3 > NF3 > PF3> CIF3
(1) CIF 3 > PF3 > NF3 > BF3
(2) BF3 > PF3 > NF3 > CIF:
(3) BF3 > CIF3 > PF3 > NF3
(4) BF3 > NF3 > PF3> CIF3
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Explanation:
Plz first refer the structure of the 4 compounds as drawn above ☝️
Acc to the structures
1.Clf3 has 2 lone pairs so its bond angle will be least
2.Bf3 has no lone pairs so it has max bond angle
3.bond angle of pf3 will be greater than nf3 because flourine is the most electronegative element and there will be no back bonding in nf3
ANSWER
BF3>PF3>NH3>CLF3
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Hope the answer helps you