JEE Main 202329 JanuaryEvening Shift
- Exam
- JEE Main
- Year
- 2023
- Date
- 29 January
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Haloalkanes and Haloarenes
JEE Main 2023 · 29 January · Evening Shift · Chemistry · Haloalkanes and Haloarenes
The one giving maximum number of isomeric alkenes on...
The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement)
Options
- A-Bromo--methylbutane
- B-Bromopropane
- C-Bromopentane
- D-Bromo-, -dimethylpentane
Correct answer
C. -Bromopentane
Step-by-step solution
In dehydrohalogenation reactions, the preferred product is that alkene which has the greater number of alkyl groups attached to the doubly bonded carbon atoms. Thus, 2-bromopentane gives pent-2-ene as the major product.
Rest all bromides are having only one type of beta hydrogen, hence, only one possible alkene is formed.