What is the major product when CH₃CH₂CH₂CH₂OH reacts with HI in the presence of red phosphorus?
HI with red phosphorus converts 1-butanol to 1-iodobutane ( CH₃CH₂CH₂CH₂I ) via substitution.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nature of C-X Bond and Methods of Preparation