Question

8: Esters can be prepared by using as an starting material

an amine and an acid
an alkane and a ketone
a ketone and an alcohol
an acid and an alcohol​

Answer 1

Esters can be prepared by using an acid and an alcohol​ as starting material

Explanation:

Ester is the chemical ethyl ethanoate CH3COOC2H5. It is a compound derived from an acid in which at least one –OH group is replaced by an –O–alkyl group. Usually, esters are derived from a carboxylic acid and an alcohol through a process called esterification.

When alcohol reacts with carboxylic acid in presence of an acid catalyst and heat, we get ester and water. This reaction is a reversible reaction. It is a condensation reaction and so water molecules are eliminated during the reaction.

Structural formula of acid is RCOOH where R is a monovalent and COOH is the carboxyl group.

Example:  

CH3COOH + CH3CH2OH --> CH3COOCH2CH3 + H2O

Answer 2

♦ An Acid and An Alcohol ♦