JEE Main · Chemistry · Haloalkanes and Haloarenes
Reactivity of Allylic and Benzylic Halides
JEE Main asked Reactivity of Allylic and Benzylic Halides 2 times in 2 of the 108 shifts Lumi analysed, in 2021 and 2024. It belongs to SN1 and SN2 Mechanisms, in Haloalkanes and Haloarenes (Chemistry). The longest wait between two years asking it was 3 years.
Updated 2026-10-24
- Times asked
- 2
- in 2 shifts
- Years
- 2 of 8
- First asked
- 2021
- last in 2024
- Pattern
- Occasional
- across the analysed shifts
Questions on this idea a shift, by year
2017–2026. Asked in 2021 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: 0 in 12 shifts · 2021: 1 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
Assertion–reason is the usual form. Skill tested: application.
- Assertion-reason on allyl halides
- Identify compounds giving a named test
Difficulty
Every question was multiple choice.
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.
- 30 Jan 2024, Shift 1 · Q74Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) :…EasyAssertion–reason
- 26 Aug 2021, Shift 1 · Q44Among the following compounds I-IV, which one forms a yellow precipitate on reacting sequentially with (i) NaOH (ii) dil. …MediumDiagram basedHas a figure
Shifts: 26 Aug 2021, Shift 1, 30 Jan 2024, Shift 1.
Same topic
Other ideas in SN1 and SN2 Mechanisms
SN1 and SN2 Mechanisms has 19 ideas JEE Main has asked; 12 of them came up in more than one question. The 12 most asked are below.
- Allylic and Benzylic Reactivity in SN17× · 2026
- Finkelstein Reaction4× · 2026
- Ambident Nucleophiles (Cyanide/Nitrite)4× · 2024
- SN2 Transition State4× · 2024
- Carbocation Rearrangements in SN13× · 2026
- Solvent Effects on Substitution3× · 2026
- Allylic and Benzylic Reactivity in SN23× · 2024
- Substrate Steric Effects3× · 2024
- Temperature Effects on Substitution vs Elimination3× · 2024
- Ambident Nucleophiles (Cyanide vs Isocyanide)2× · 2024
- SN1 Carbocation Intermediate2× · 2023
- Inertness of Vinylic and Aryl Halidesonce · 2024