Chapter 13 Notes | Chemistry 2nd Year
- Organic compounds containing carboxylic group are called carboxylic acids. There are two classes of carboxylic acids. Ie., aliphatic and aromatic carboxylic acids. Aliphatic carboxylic acids are also called fatty acids.
- Carboxylic acids can be produced by the oxidation of alcohols and aldehydes and by the hydrolysis of nitrites
- Lower members of the series are water soluble and have pungent smell.
- Solubility decreases with the increase in moleculer mass.
- Carboxylic asids have higher boiling points than the corresponding alcohols.
- Boiling point increases with the increase in the molar mass.
- Acid chlorides, acid amides, easters and acid anhydrides are called derivatives of carboxylic acids.
- Acetic acid is synthesized on commercial scale from acetylene.
- Carboxylic acids containing amino group in their molecules are called amino acids. The are classified as neutral, basic and acidic amino acids.
- Amino acids join together to produce peptides. A polypeptied has a molecular mass upto 10,000 wheeas the molecular mass of protien is greater than 10,000.
See Also: Chemistry 2nd Year Paper Scheme 2021