Question

3. What is meant by homologous series
? Write the first four members of
homologous series that begins with
A. CH CHO B. H-C=C-H
Also write down their general molecular
formula.
ful
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Answer 1

Answer:

A homologous series is a family of hydrocarbons with similar chemical properties who share the same general formula. We will look at three hydrocarbon series: alkanes, alkenes and the cycloalkanes. Hydrocarbons are compounds that contain only hydrogen and carbon.

The homologous series of straight-chained alkanes begins methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), and pentane (C5H12). In that series, successive members differ in mass by an extra methylene bridge (-CH2- unit) inserted in the chain.

Homologous series is a series of compounds with similar chemical properties and some functional group differing from the successive member by CH2. ... Alkanes with general formula CnH2n+2, alkenes with general formula CnH2n and alkynes with general formula CnH2n-2 form the most basic homologous series in organic chemistry.

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