
Methane belongs to the homologous series of alkanes.
A ) True
B ) False
Answer
510k+ views
Hint: Homologous series contains compounds having similar chemical properties and same functional groups. Successive members of homologous series differ by a methylene group.
Complete step by step answer:
Organic compounds with the same general formula have carbon atoms of varying length. A series of compounds can be formed in which the general formula is the same and the individual members (organic compounds ) of the series differ by a repeating unit. Such a series is called a homologous series.
Alkanes form a homologous series. The general formula of alkanes is . Here, n represents the number of carbon atoms. In the homologous series of alkanes, the repeating unit is a methylene group. The methylene group is represented by the formula . Methane is the first member of alkane homologous series. The chemical formula of methane is . When n is 1, the chemical formula of methane is obtained.
Ethane is the second member of the alkane homologous series. The chemical formula of ethane is . When n is 2, the chemical formula of ethane is obtained.
Propane is the third member of the alkane homologous series. The chemical formula of propane is . When n is 3, the chemical formula of propane is obtained.
The molecular formula of methane, ethane, propane, butane, pentane and hexane are shown below.
The structural formula of methane, ethane, propane, butane, pentane and hexane are shown below.
From the above structural formulae, you can conclude that each successive member of the alkane homologous family has one additional methylene group.
Methane belongs to the homologous series of alkanes.
Hence, the given statement is true
So, the correct answer is “Option A”.
Note: Alkenes form a homologous series. The general formula of alkenes is .
Alkynes form a homologous series. The general formula of alkynes is .
Complete step by step answer:
Organic compounds with the same general formula have carbon atoms of varying length. A series of compounds can be formed in which the general formula is the same and the individual members (organic compounds ) of the series differ by a repeating unit. Such a series is called a homologous series.
Alkanes form a homologous series. The general formula of alkanes is
Ethane is the second member of the alkane homologous series. The chemical formula of ethane is
Propane is the third member of the alkane homologous series. The chemical formula of propane is
The molecular formula of methane, ethane, propane, butane, pentane and hexane are shown below.
The structural formula of methane, ethane, propane, butane, pentane and hexane are shown below.
From the above structural formulae, you can conclude that each successive member of the alkane homologous family has one additional methylene
Methane belongs to the homologous series of alkanes.
Hence, the given statement is true
So, the correct answer is “Option A”.
Note: Alkenes form a homologous series. The general formula of alkenes is
Alkynes form a homologous series. The general formula of alkynes is
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