Question

Why homologous series of carbon compounds are so called? Write chemical formula of two consecutive members of a homologous series and state the part of these compounds that determines their (i) physical properties, and (ii) chemical properties. (3)

Answer 1

homologous series of carbon compounds are so called because they differ by CH2. examples are ethane (CH4) and methane (C2H6) and so on..

Answer 2

Homologous series of carbon compounds

Explanation:

Homologous series of organic chemical compounds are listed in a specific order. These are arranged as per the increase in size and the similarity in structure and the formula(as per the similarity in properties).

The other compounds are placed in carbon chain whose structures are different only by the number of −C$H_{2}$ units.

The two consecutive members of a homologous series are $CH_{3} CH_{2} OH$ and $CH_{3} CH_{2} CH_{2} OH$.

i) Physical properties - $CH_{3}$ in $CH_{3} CH_{2} OH$ and $CH_{3} CH_{2} OH$ in $CH_{3} CH_{2} CH_{2} OH$.

ii). Chemical properties -OH is the functional group.

Learn more: Chemical properties

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