I don't get this organic chemistry multiple choice question?

[From: ] [author: ] [Date: 14-02-19] [Hit: ]

D.Why is the correct answer D? Please explain. Thanks!- Homologous series refers to the group of that family with same functional groups. Option D are the same member as of carboxylic acid(COOH) while others do not follow the rule.......

The question is: Which of the following pairs represent members of an homologous series?

The options are:
A. C2H4 and C2H6
B. C2H5Cl and C2H4Cl2
C. CH3OCH3 and CH3CH2OH
D. C3H7COOH and C4H9COOH

Why is the correct answer D? Please explain. Thanks!

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Homologous series refers to the group of that family with same functional groups. Option D are the same member as of carboxylic acid(COOH) while others do not follow the rule. Option A has a ethane and ethene, Option B has mono and dichloro product, Option C has a ether and an alcoholic group. But the option D are the same members of the acid group.

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Try Googling "homoogous seiries"

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