Which of the following has tetrahedral geometry?

Options

A. `OF_(2)`
B. `Cl_(2)O`
C. `Br_(2)O`
D. all of these

Answer

4

Explanation

The geometries of `OF_(2),Cl_(2)O` and `Br_(2)O` are all related to a tetrahedron with two positions occupied by lone pairs of electrons .
Valence shell electrons configuration of `O` atom in its ground state:

Valence shell electronic configuration of `O` atom having shared two electron pairs by froming covalent bonds to two halgon atoms:

Repulsion between the lone pairs reduces the bond angle in `F_(2)O` from the trtraheldral angle of `109^(@) 28'` to `103^(@)`

However in `Cl_(2)O` and `Br_(2)O` the bond angle is increased on account of steric hindrance between the larger halogen atoms