Carboxylic acids Quiz
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5 questions, one answer each
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1. Which functional group is present in ethanoic acid?
- A. –COOH
- B. –CHO
- C. –COCl
- D. –CO–
2. What is the colour change when ethanol is oxidised to ethanoic acid by acidified dichromate(VI)?
- A. Green to orange
- B. Colourless to orange
- C. Blue to brick-red
- D. Orange to green
3. Which pair of reagents makes propanoic acid from propanenitrile?
- A. NaOH(aq) at room temperature
- B. PCl₅ and heat
- C. Dilute hydrochloric acid and heat
- D. LiAlH₄ in dry ether
4. What is formed when ethanoic acid is warmed with ethanol and concentrated sulfuric acid?
- A. Ethanal
- B. Ethyl ethanoate
- C. Ethanoyl chloride
- D. Sodium ethanoate
5. Which statement correctly explains why ethanoic acid boils at a higher temperature than propanal?
- A. Ethanoic acid has stronger covalent bonds
- B. Ethanoic acid has more electrons
- C. Propanal is ionic
- D. Ethanoic acid molecules hydrogen bond to each other