CCl4
For central atom C
The formula to calculate hybridization is:
n= 1/2 [group no. central atom +no. of monovalent atoms attached to central metal atom (except oxygen) + magnitude of negative charge - magnitude of positive charge]
n= 1/2 [4 +4 + 0-0]
n= 1/2 [8)
=4
The hybridization is sp3 and the electron geometry is tetrahedral