JEE Main · Chemistry · Polymers
Buna-S (SBR) Monomers
JEE Main asked Buna-S (SBR) Monomers 3 times in 3 of the 108 shifts Lumi analysed, in 2021 and 2023. It belongs to Polymers (Chemistry). The longest wait between two years asking it was 2 years. In 2021 it came in more than one shift of the same year.
Updated 2026-10-24
- Times asked
- 3
- in 3 shifts
- Years
- 2 of 8
- First asked
- 2021
- last in 2023
- Pattern
- Occasional
- across the analysed shifts
Questions on this idea a shift, by year
2017–2026. Asked in 2021 and 2023. 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: 2 in 24 shifts · 2022: 0 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 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
Single correct is the usual form. Skill tested: recall.
- Structure of buna-s
- True statement selection on polymers
Difficulty
Every question was multiple choice.
Every question
All 3 questions
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
- 10 Apr 2023, Shift 2 · Q78Buna-S can be represented as:EasySingle correct
- 25 Feb 2021, Shift 1 · Q49Which statement is correct ?MediumSingle correct
- 24 Feb 2021, Shift 2 · Q48In polymer Buna-S : ‘S’ stands for :EasySingle correct
Shifts: 24 Feb 2021, Shift 2, 25 Feb 2021, Shift 1, 10 Apr 2023, Shift 2.
Same topic
Other ideas in Polymers
Polymers has 22 ideas JEE Main has asked; 12 of them came up in more than one question. The 12 most asked are below.
- Polymer Classification9× · 2023
- Neoprene Synthesis4× · 2022
- Common Condensation Polymers3× · 2023
- Novolac Structure and Role3× · 2022
- HDPE vs LDPE and Ziegler-Natta Catalyst2× · 2023
- Common Addition Polymers2× · 2022
- Natural and Synthetic Rubber2× · 2022
- Novolac Intermediate Formation2× · 2022
- PHBV Monomers2× · 2022
- Terylene (Dacron) Monomers2× · 2022
- Homopolymers vs Copolymers (Buna-S and Buna-N)2× · 2021
- Polyacrylonitrile (PAN / Orlon)once · 2023