A researcher needs to purify an aldehyde from a non-carbonyl impurity. Which reagent forms a crystalline addition product that allows easy separation?
Q1. A researcher needs to purify an aldehyde from a non-carbonyl impurity. Which reagent forms a crystalline addition product that allows easy separation?
Answer: NaHSO3
Explanation: Aldehydes form crystalline bisulphite adducts that can be filtered and hydrolyzed back. NaCN is used for synthesis, not purification.