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Which of the following is not a correct ...

Which of the following is not a correct statement?

A

Every `AB_5` molecule has square pyramidal structure.

B

Multiple bonds are always shorter than the corresponding single bonds.

C

The electron-deficient molecules can act as Lewis acids.

D

The cannonical structure has no real existence.

Text Solution

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The correct Answer is:
A
`AB_5` molecule having one lone pair on the central atom (e.g., `BrF_5`) has square pyramidal shape but `AB_5` molecule having zero lone pair on the central atom (e.g., `PCl_5`) has trigonal bipyramidal shape.
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