Which compound is formed when butanal reacts with HCN?
Butanal (CH₃CH₂CH₂CHO) reacts with HCN to form butanal cyanohydrin (CH₃CH₂CH₂CH(OH)CN).
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Nomenclature, Structure and Preparation of Aldehydes and Ketones