MHT CET202611 April 2026Morning ShiftChemistryHaloalkanes and HaloarenesActual
The major product 'B' in the below mentioned reaction is-
Options
- ABromoethane
- B1-Bromopropane
- C2-Bromopropane
- DCarbontetrabromide
Correct answer
C. 2-Bromopropane
Step-by-step solution
The given reactant is 2-bromopropane ( CH ₃- CH ( Br )- CH ₃ ). When 2-bromopropane is treated with alcoholic KOH and heated, it undergoes dehydrohalogenation ( -elimination) to form propene (A). CH ₃- CH ( Br )- CH ₃ Alc. KOH, CH ₃- CH = CH ₂ Next, propene (A) reacts with HBr in the absence of peroxide. This is an electrophilic addition reaction that follows Markovnikov's rule. The negative part of the addendum ( Br ^- ) attaches to the carbon atom of the double bond that has fewer hydrogen atoms. CH ₃- CH = CH ₂