Question

The first member of alkyne homologous series is
(a) ethyne
(b) ethene
(c) propyne
(d) methane

NCERT Class X
Science - Exemplar Problems

Chapter_Carbon and its Compounds

Answer 1

The first member of alkyne homologous series is ethyne.

Answer 2

Ethyne is the 1st member of ‘alkyne homologous’ series.

Option: (a)

Explanation:

• In the field of organic chemistry, an alkyne can be considered as an unsaturated hydrocarbon which has at least one c-c tripe bond.  

• The simplest basic form of alkyne consists of one triple bond with no other functional groups. Thus it forms a homologous series along with a primary formula $\bold{\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}-2}}$.  

• These alkynes can be defined as acetylenes. It can also be commonly referred as ethyne using a format in IUPAC nomenclature.  

Learn more about Ethyne

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