Q. Which of the following is nucleophilic addition reaction?

 278  153 NTA AbhyasNTA Abhyas 2022 Report Error

Solution:

Sodium hydrogen sulphite adds to aldehydes and ketones to form crystalline bisulphite addition products. The product is water soluble and can be converted back to the original carbonyl compound by treating it with dilute mineral acid or alkali. Therefore, these are useful for separation and purification of aldehydes like acetaldehydes.