The number of C-Cl bonds (carbon being sp2 hybridized) in D.D.T is

The correct answer is Option (3) → 2

The hybridisation of a carbon atom depends on the bonds it forms. A carbon in a benzene ring is sp² hybridised, while a carbon with four single bonds is sp³ hybridised. So a chlorine on a benzene ring (aryl halide) is bonded to an sp² carbon, and a chlorine on an alkyl carbon to an sp³ carbon.

DDT is p,p′-dichlorodiphenyltrichloroethane, IUPAC name 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane:

    \( \displaystyle \ce{(Cl-C6H4)2CH-CCl3} \)

It has five C–Cl bonds:

• One chlorine on each of the two benzene rings: 2 C–Cl bonds with sp² carbon.

• Three chlorines on the CCl₃ carbon: 3 C–Cl bonds with sp³ carbon.

So the number of C–Cl bonds with an sp² carbon in DDT is 2.

NCERT (2026-27 edition):
DDT