Which of the following is a secondary halide?
A secondary halide has the halogen on a carbon bonded to two other carbons. CH₃CH₂CHBrCH₃ (3-bromobutane) is secondary.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Polyhalogen Compounds - Chloroform Iodoform DDT Freons