A laboratory technician wants to separate an aldehyde from a non-carbonyl impurity. Which reagent can form a crystalline solid that allows for purification?
Q1. A laboratory technician wants to separate an aldehyde from a non-carbonyl impurity. Which reagent can form a crystalline solid that allows for purification?
Answer: Sodium bisulphite
Explanation: Sodium bisulphite forms white crystalline adducts with aldehydes, which can be hydrolyzed back to the original compound. Fehling's solution is used for identification, not purification.