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Sunday, 25 October

JEE Main · Chemistry · Chemical Bonding and Molecular Structure

VSEPR Theory: JEE Main previous year questions

77 questions in the 108 JEE Main shifts Lumi analysed, in 7 of 8 years. Pattern: Asked most years. 34 came in 2024–26. Here is how it is asked and which ideas come back.

Questions
77
in 63 of 108 shifts
Years asked
7/8
last asked 2026
Chance in a shift
71%
calibrated model, how we compute it
Weighted estimate
0.7
model; history: 0.6 a shift on average, typically 0.3–0.8

Key findings

  1. 01

    Asked in 7 of 8 years with analysed shifts and in 63 of 108 shifts: 77 questions, #22 of 196 topics.

  2. 02

    35% of its questions since 2020 tested an idea no earlier year had asked; 35 repeated an idea from the year before.

  3. 03

    The most repeated idea is Steric Number Calculation, asked 14 times in 13 shifts (2021, 2022, 2023, 2024, 2025, 2026), most often as “count species with given hybridisation”.

  4. 04

    JEE Main has asked 25 of the 55 ideas in this topic; 23 have never been asked, directly or inside another question.

  5. 05

    Mostly asked as single correct (40%); 31% need a numerical answer, 36% are easy and 3% hard. It went up from 0.4 to 0.8 questions a shift since 2024.

  6. 06

    The skill tested most is application (43%), then conceptual (29%).

Questions a shift, year by year

Out of the 25 Chemistry questions in a shift. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift.

00.510’170.5’200.3’210.6’220.8’231.0’240.8’250.8’26

Raw count: 2017: 0 in 1 shift · 2020: 6 in 12 shifts · 2021: 10 in 24 shifts · 2022: 16 in 24 shifts · 2023: 11 in 12 shifts · 2024: 21 in 18 shifts · 2025: 6 in 8 shifts · 2026: 7 in 9 shifts.

Up to 2023
0.4
a shift, of 25
Since 2024
0.8
+0.4
Usual gap
1.0 yrs
between years asking it
Shifts with it
63/108
58% of analysed shifts

Recent framings

  • predict shapes of ions by VSEPR
  • odd-one-out among species pairs
  • statement I/II on lone pairs and octet

Revise first

  • Steric Number Calculation · asked 2021, 2022, 2023, 2024, 2025, 2026
  • Octahedral and Square Planar · asked 2020, 2023, 2026
  • Net Dipole Moment from VSEPR Symmetry · asked 2020, 2022, 2023, 2024

How it is asked

Difficulty, format and skill

Across all 77 questions on VSEPR Theory since 2017.

Difficulty

QUESTIONS
2847
  • Easy28 · 36%
  • Medium47 · 61%
  • Hard2 · 3%

Format

SHARE
  • Single correct · 31 Q40%
  • Numerical value · 24 Q31%
  • Match the list · 12 Q16%
  • Two statements · 8 Q10%
  • Assertion–reason · 1 Q1%
  • Other · 1 Q1%

Skill tested

SHARE
  • Application · 33 Q43%
  • Conceptual · 22 Q29%
  • Recall · 10 Q13%
  • Multi-step · 7 Q9%
  • Calculation · 5 Q6%

Repeats

New idea, or one asked before?

Each column is a year. Blue questions tested an idea no earlier year had asked; navy ones went back to an idea from an earlier year. 2017 is the first year, so everything in it counts as new. Heights are question counts, and Lumi analysed 1 to 24 shifts a year, so compare the split inside a column rather than heights across years.

6
10
16
11
21
6
7
’17’20’21’22’23’24’25’26
  • Idea asked for the first time
  • Idea asked in an earlier year

Coverage of the topic

JEE Main has asked 25 of the 55 ideas in this topic. 23 have never been asked yet.

25723
  • Asked directly25 · 45%
  • Touched inside another question7 · 13%
  • Never asked23 · 42%

Ideas come from Lumi’s JEE syllabus map. A never-asked idea is not a safe skip: across all of JEE Main, 22% of questions since 2024 tested an idea no earlier year had asked.

Drill down

Chapter, idea, question

Every idea JEE Main tested in this topic, with its eight years. Open one to read the questions.

  • Open71 · 92%41015102165

    24 ideas inside

    • OpenRepeated14 · 20%4422
    • OpenRepeated8 · 11%24
    • OpenRepeated7 · 10%24
    • OpenRepeated7 · 10%24
    • OpenRepeated4 · 6%22
    • OpenRepeated4 · 6%
    • OpenRepeated3 · 4%2
    • OpenRepeated3 · 4%
    • OpenRepeated3 · 4%2
    • OpenRepeated2 · 3%
    • OpenRepeated2 · 3%
    • OpenRepeated2 · 3%
    • Open1 · 1%
    • Open1 · 1%
    • Open1 · 1%
    • Open1 · 1%
    • Open1 · 1%
    • Open1 · 1%
    • Open1 · 1%
    • Open1 · 1%
    • Open1 · 1%
    • Open1 · 1%
    • Open1 · 1%
    • Open1 · 1%
  • Open5 · 6%2
  • Open1 · 1%

Squares are the 8 years with analysed shifts, 2017 to 2026. A number is the questions that year when there is more than one; the shade is scaled to one shift, so a year with more analysed shifts (1 to 24 a year) does not look darker. Share is of the level above.

Ideas

Every idea inside this topic

25 different ideas were tested; 13 came more than once.

Times and shifts count every analysed shift. Across JEE Main, 78% of questions since 2024 went back to an idea an earlier year had asked; the rest were new. All repeated ideas

Every question

VSEPR Theory questions, year by year

The newest 40 show their opening words as they appeared in the official paper; older ones name the idea they tested. Open one for its options and the official answer.

JEE Main 20267 questions in 6 shifts

JEE Main 20256 questions in 5 shifts

JEE Main 202421 questions in 14 shifts

JEE Main 202311 questions in 9 shifts

JEE Main 202216 questions in 14 shifts

Questions from the official JEE Main Paper 1 shifts published by NTA (CBSE for 2017). Questions NTA dropped are left out. Topic and idea tags, counts and notes are Lumi’s.