"Hybridisation of central atom does not always change due to back bonding"

CHEMISTRY · Single correct · CBSE · Chemistry · Chemical Bonding and Molecular Structure · Chemical Bonding and Molecular Structure

Problem

"Hybridisation of central atom does not always change due to back bonding". This statement is valid for which of the following compounds ? (1)

CCl_3^-

(2)

CCl_2

(3)

(SiH_3)_2O

(4)

N(SiH_3)_3