Carboxylic Acids Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
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1. Which functional group is found in all carboxylic acids?
- A. –OH
- B. –COOH
- C. C=C
- D. –NH2
2. What are the products when a carboxylic acid reacts with a metal carbonate?
- A. A salt and hydrogen only
- B. A salt, water and carbon dioxide
- C. An ester and water
- D. A salt and oxygen
3. What is produced when ethanoic acid reacts with ethanol?
- A. Ethanal and oxygen
- B. Ethyl ethanoate and water
- C. Ethene and hydrogen
- D. Sodium ethanoate and hydrogen
4. Why are carboxylic acids described as weak acids?
- A. They are always dilute
- B. They only partially ionise in solution
- C. They contain no hydrogen ions
- D. They cannot react with metals
5. A student ferments glucose solution with yeast at 35°C in a sealed flask with no air. What two products should they expect, and why is the flask sealed?
- A. Oxygen and water; sealing keeps the yeast alive by trapping oxygen
- B. Ethanol and carbon dioxide; sealing maintains anaerobic conditions needed for fermentation
- C. Carboxylic acid and hydrogen; sealing raises the pressure to speed the reaction
- D. Methanol and oxygen; sealing prevents the sugar from evaporating