Which of the following is not correct ?

Options

A. `XeO_(3)` has four ` sigma ` and four `pi`-bonds
B. The hybridisation of Xe in `XeF_4` is ` sp^(3)d^(2)`
C. Among noble gases ,the occurrence ( per cent by weight ) of argon is highest in air
D. Liquid helium is used as cryogenic liquid

Answer

A

Explanation

`XeO_(3)` has the following structure ,

Number of `sigma`-bonds=3 , Number of `pi`-bonds =3