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Acetals and ketals are readily hydrolysed back to the carbonyl compound by

  1. Adilute aqueous sodium hydroxide
  2. Bdilute aqueous hydrochloric acid
  3. Caqueous sodium bicarbonate
  4. Dlithium aluminium hydride in ether

Answer: B

Acetals are ethers of a gem-diol. They are stable to bases and nucleophiles but are cleaved by aqueous acid through protonation and formation of an oxocarbenium ion, which is then attacked by water.
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