MHTCET 17 Apr 2026 Shift 1 Paper

Concept:A haloalkyne is an alkyne in which a halogen atom is directly attached to an $sp$-hybridised carbon of the triple bond.Explanation:In chloroethyne, the structure is $\mathrm{H}-C \equiv C-\mathrm{Cl}$.Here, the chlorine atom is directly bonded to an $sp$-hybridised carbon atom, so chloroethyne is correctly classified as a haloalkyne.In the remaining options, chlorine is attached to an $sp^3$-hybridised carbon that is adjacent to the triple bond.Such compounds are propargylic halides, not haloalkynes.Hence, only option A fits the definition.Answer:Option A – Chloroethyne.