Give functional isomers of ethanoic acid and propanone with their structural formula. GROUP: B Short answer questions 5 × 5 = 25

Ethanoic acid ($\mathrm{CH}{}_3\mathrm{COOH}$) and propanone ($\mathrm{CH}{}_3\mathrm{COCH}{}_3$) are functional isomers because they have the same molecular formula ($\mathrm{C}{}_3\mathrm{H}{}_6\mathrm{O}$) but different functional groups.

Functional Isomers:

1. Ethanoic acid (carboxylic acid):

acetic acidacetic acid

• Structural formula: $\mathrm{CH}{}_3\mathrm{COOH}$

C₂H₄O₂+C₃H₆OC₂H₄O₂+C₃H₆O

2. Propanone (ketone):

acetic acidacetic acidpropanonepropanone

• Structural formula: $\mathrm{CH}{}_3\mathrm{COCH}{}_3$

Explanation:

• Ethanoic acid contains a carboxyl group ($-\mathrm{COOH}$), while propanone contains a carbonyl group ($\mathrm{C}=\mathrm{O}$) bonded to two carbon atoms.
• Both have the same molecular formula ($\mathrm{C}{}_3\mathrm{H}{}_6\mathrm{O}$) but differ in functional groups, making them functional isomers.

Ethanoic acid (CH₃COOH)Ethanoic acid (CH₃COOH)