Question

(a) What is meant by a functional group ? Explain with an example.
(b) Write three common functional groups present in organic compounds. Give their symbols/formulae.
(c) Name the functional groups present in the following compounds :
(i) CH3COOH (ii) CH3CH2CHO (iii) C2H5OH (iv) CH3COCH2CH3
(d) Name the functional group which always occurs in the middle of a carbon chain.
(e) Draw the structures for the following compounds :
(i) Ethanal (ii) Propanal (iii) Butanal (iv) Pentanal

Lakhmir Singh Chemistry Class 10

Answer 1

Answer:

Function Group :- They are structural units in organic chemistry which are defined by specific binding arrangements.... functional groups are specific substituents or moieties within molecules that are responsible for the characteristic chemical reactions of those molecules.

examples are :-

1). COOH ( carboxylic acid )

2). OH ( Alcohol)

3). C = O ( carboxyl group )

etc.

b. Three common functional groups that are used in the organic compounds are :

1) -OH : Alcohol group

2) -CHO : Aldehyde group

3) -COOH : Carboxylic group

c. 1. carboxylic acid

   2. Aldehydes

   3.  alcohol

   4. ketone

d. Ketonic

e. for the ans for e look at the attachments. (attachements according to the question)

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