Question

(a) Define a homologous series. Give the name and structural formula of one homologue of the following :
CH3OH
(b) Write the molecular formula of the third member of the homologous series of carbon compounds with general formula CnH2n+1OH.
(c) Name any two fossil fuels.

Lakhmir Singh Chemistry Class 10

Answer 1

Answer:

A) A homologous series is a series in which each successive member differs by a CH2 group.

For CH3OH the next member of homologous series would be CH3CH2OH.

B) It will be CH3CH2CH2OH.

C) Coal and petroleum.

Hope it help

Explanation:

Answer 2

Hello Students,

◆ Answers -

(a) Homologous series -

Homologous series is a series of compounds with the same functional group.

CH3OH (methanol) is member of alcohol homologous series. Next member in this series is ethanol (C2H5OH) with structural formula CH3-CH2-OH.

(b) Compounds with general formula CnH2n+1OH are called alcohols. 3rd member in alcohol series is propanol (C3H7-OH).

(c) Fossil fuels -

• Petroleum
• Natural gas
• Coal

Thanks dear...