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Question

Correct statement(s) regarding As(CH3)F2Cl2 molecule is/are:

A
Maximum three halogen atoms can lie in same plane
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B
Both axial and equatorial plane have equal number of atoms
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C
AsCl bond length is longer than AsF bond length
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D
Maximum five atoms can lie in equatorial plane
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Solution

The correct option is D Maximum five atoms can lie in equatorial plane
The geomtery of As(CH3)F2Cl2 according to bents rule is:
The F (more electronegative atom) occupy axial position.
Now imagine this trigonal bipyramidal geomtery in 3-dimension.

(a) The plane which passes from (Cl1,F1,F2,As) contains 3 - halogen atoms.

(b) Axial plane maximum atom = 5 [F1,F2,As,C,H]
equatorial plane maximum atom = 5 [Cl1,Cl2,As,C,H]

(c) (B.L.)AsCl>(B.L.)AsF
As size of Cl - atom >> F - atom.

(d) Equatorial plane maximum atoms = 5 [Cl1,Cl2,As,C,H]
Hence, all options are correct.

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