Question

The fruity smell is of a/an:
(a) aldehyde
(b) ketone
(c) alcohol
(d) ester

Answer 1

To know which of the following groups gives a fruity smell, we should know about their physical properties like whether they are colored or colorless, have pungent, suffocating ,fruity or no smell , solubility, boiling point etc.

Complete answer:
By knowing the physical properties of aldehydes, ketones ,alcohols and ester, we can easily identify the functional group which gives the fruity smell.
Let’s discuss their physical properties in the tabular form through which it is easy to understand them.

Sr. no	Functional group	Physical properties
	color	smell
1.	Aldehyde	colorless
2.	Ketone	colorless
3.	Alcohol	colorless
4.	Ester	colorless

So, thus from this table it's clear that the functional group which has a fruity smell is ester.

Hence, option (d) is correct.

Note: Ester are the compounds which are formed from the carboxylic acids by the replacement of the -OH group i.e. hydroxyl group in carboxylic acid by the -O-R group i.e. the alkoxy group these are the organic compounds and are quickly react with the water to form alcohols and acids.