A primary amine X reacts with HNO₂ to give CH₃CH₂CH₂CH₂OH. X is:
Butan-1-amine (CH₃CH₂CH₂CH₂NH₂) reacts with HNO₂ to form butan-1-ol (CH₃CH₂CH₂CH₂OH) and N₂, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Preparation - Hoffmann Bromamide and Reduction of Nitro Compounds