Question

Pick out and name the Functional group present in the following compounds :

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH},{\mathrm{CH}}_3\mathrm{CHO},{\mathrm{CH}}_3{\mathrm{COCH}}_3,{\mathrm{CH}}_3\mathrm{COOH},{\mathrm{CH}}_3{\mathrm{COOC}}_2{\mathrm{H}}_5$

Answer 1

Part 1: Functional group of ${\mathbf{CH}}_{\mathbf{3}}{\mathbf{CH}}_{\mathbf{2}}\mathbf{OH}$
1. The common name of this compound is Ethyl Alcohol.

2. $\mathbf{-}\mathbf{OH}$ group is present at the terminal Carbon atom.

3. Hence, Its functional group name is Alcoholic or Hydroxyl group.

Part 2: Functional group of ${\mathbf{CH}}_{\mathbf{3}}\mathbf{CHO}$
1. The common name of this compound is Acetaldehyde.

2. $\mathbf{-}\mathbf{CHO}$ group is present at the terminal Carbon atom.

3. Hence, Its functional group name is Aldehydic group.

Part 3: Functional group of ${\mathbf{CH}}_{\mathbf{3}}{\mathbf{COCH}}_{\mathbf{3}}$​
1. The common name of this compound is Acetone.

2. $\mathbf{-}\mathbf{CO}\mathbf{-}$ group is present at the terminal Carbon atom.

3. Hence, Its functional group name is Ketonic group.

Part 4: Functional group of ${\mathbf{CH}}_{\mathbf{3}}\mathbf{COOH}$
1. The common name of this compound is Acetic Acid.

2. $\mathbf{-}\mathbf{COOH}$ group is present at the terminal Carbon atom.

3. Hence, Its functional group name is Carboxyl group.

Part 5: Functional group of ${\mathbf{CH}}_{\mathbf{3}}{\mathbf{COOC}}_{\mathbf{2}}{\mathbf{H}}_{\mathbf{5}}$
1. The common name of this compound is Ethyl Acetate.

2. Since $\mathbf{-}\mathbf{COOR}$ group is present at the terminal Carbon atom.

3. Hence, Its functional group name is Ester.