What is a functional group? 2. Name the functional group(s) in each of the following compounds: a. CH3CH=CH2 b. CH3CH2OH c. CH3CH(OH)CO2H d. CH3COCH3 e. CH3COOCH2CH3 f. H2NCH2COOH

1. What is a functional group?
A functional group is a specific group of atoms within a molecule that is responsible for the characteristic chemical reactions of that molecule. It determines the molecule's chemical properties and reactivity.

2. Name the functional group(s) in each of the following compounds:

• a) $\text{CH}_3\text{CH}=\text{CH}_2$:
  • Functional group: Alkene (carbon-carbon double bond, $\text{C}=\text{C}$)
• b) $\text{CH}_3\text{CH}_2\text{OH}$:
  • Functional group: Hydroxyl (alcohol, $-\text{OH}$)
• c) $\text{CH}_3\text{CH(OH)CO}_2\text{H}$:
  • Functional groups: Hydroxyl (alcohol, $-\text{OH}$) and Carboxyl (carboxylic acid, $-\text{COOH}$)
• d) $\text{CH}_3\text{COCH}_3$:
  • Functional group: Carbonyl (ketone, $\text{C}=\text{O}$ within a chain)
• e) $\text{CH}_3\text{COOCH}_2\text{CH}_3$:
  • Functional group: Ester ($-\text{COO}-$)
• f) $\text{H}_2\text{NCH}_2\text{COOH}$:
  • Functional groups: Amino ($-\text{NH}_2$) and Carboxyl (carboxylic acid, $-\text{COOH}$)