Chemistry 9701 · AS & A Level · Carbonyl compounds

Carbonyl compounds — practice question

Acrolein is an organic compound whose molecular formula is $\text{C}_3\text{H}_4\text{O}$. It has uses in water treatment and as a herbicide. When acrolein is reacted with $2,4$-dinitrophenylhydrazine, an orange precipitate forms. Acrolein gives a silver mirror with Tollens’ reagent. Which of the following statements are correct? 1. Acrolein reacts with alkaline aqueous iodine to form a yellow precipitate. 2. Acrolein can be reduced to a primary alcohol. 3. Acrolein decolourises bromine water.

  • A1, 2 and 3 are correct
  • B1 and 2 only are correct
  • C2 and 3 only are correct
  • D1 only is correct

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