JEE Main · Chemistry · Hydrocarbons
Stereochemistry of Free Radical Halogenation
JEE Main asked Stereochemistry of Free Radical Halogenation 2 times in 2 of the 108 shifts Lumi analysed, in 2020 and 2024. It belongs to Alkanes and Free Radicals, in Hydrocarbons (Chemistry). The longest wait between two years asking it was 4 years.
Updated 2026-10-24
- Times asked
- 2
- in 2 shifts
- Years
- 2 of 8
- First asked
- 2020
- last in 2024
- Pattern
- Occasional
- across the analysed shifts
Questions on this idea a shift, by year
2017–2026. Asked in 2020 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.
Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.
Shift by shift
Each square is one analysed shift, in date order. Open a filled one for that paper.
How JEE Main framed it
Numerical value is the usual form. Skill tested: calculation.
- Count monochlorination isomers of 2-methylbutane
- Count monohalogenated products including stereoisomers
Difficulty
2 of the 2 questions had a numerical answer.
Every question
All 2 questions
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
- 1 Feb 2024, Shift 2 · Q88Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2-methylbutane is ________.MediumNumerical value
- 3 Sep 2020, Shift 1 · Q50The total number of monohalogenated organic products (including stereoisomers) in the following reaction is __________. A…HardNumerical value
Shifts: 3 Sep 2020, Shift 1, 1 Feb 2024, Shift 2.
Same topic
Other ideas in Alkanes and Free Radicals
Alkanes and Free Radicals has 18 ideas JEE Main has asked; 11 of them came up in more than one question. The 12 most asked are below.
- Wolff-Kishner Reduction to Alkanes4× · 2024
- Halogenation Chain Mechanism3× · 2026
- Clemmensen Reduction to Alkanes3× · 2024
- Alkane Synthesis via Grignard Protonation3× · 2022
- Ethane and Butane Conformers3× · 2022
- Catalytic Isomerization of Alkanes2× · 2026
- General Stoichiometry of Alkane Combustion2× · 2026
- Hydrolysis of Grignard Reagents2× · 2026
- Kolbe's Electrolytic Method2× · 2026
- Aromatization (Reforming) of Alkanes2× · 2021
- Free Radical Stability Trendsonce · 2025
- Melting Point Alternation Effectonce · 2025