MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

A haloalkyne (or alkynyl halide) is a compound in which a halogen atom is directly bonded to an sp-hybridized carbon atom of the carbon-carbon triple bond. In chloroethyne (Cl-C CH), the chlorine atom is directly attached to the sp-hybridized carbon atom. Therefore, it is a haloalkyne. In 3-chloropropyne (HC C-CH_2-Cl), 1-chloropent-2-yne (CH_3-CH_2-C C-CH_2-Cl), and 4-chloropent-2-yne (CH_3-CH(Cl)-C C-CH_3), the chlorine atom is attached to an sp^3-hybridized carbon atom. Answer: Chloroethyne