Which of the following belongs to a homologous series of alkynes?

Question

Question

This question was previously asked in

Rajasthan 3rd Grade (Maths & Science) Official Paper (Held On: 25 Feb 2023 Shift 2)

Answer 1

CONCEPT:

Homologous Series of Alkynes

A homologous series is a group of organic compounds with the same functional group and similar chemical properties, where each successive member differs by a CH₂ unit.
Alkynes are hydrocarbons that contain at least one carbon-carbon triple bond (-C≡C-).
The general molecular formula for alkynes is C_nH_2n-2.

EXPLANATION

C₂H₄: This is an alkene (double bond) with the molecular formula C_nH_2n. It does not belong to the homologous series of alkynes.
C₃H₄: This follows the general formula of alkynes (C_nH_2n-2) and contains a triple bond. It belongs to the homologous series of alkynes.
C₆H₆: This is an aromatic compound (benzene) and does not belong to the homologous series of alkynes.
C₂H₆: This is an alkane with the molecular formula C_nH_2n+2. It does not belong to the homologous series of alkynes.

The only compound in the list that belongs to the homologous series of alkynes is C₃H₄. Therefore, the correct answer is C₃H₄.