Isomerism is a Class 11 chapter in the Chemistry section of the MHT CET for candidates who are preparing for the PCM (Physics, Chemistry, and Mathematics).
The key topics covered in Isomerism PYQs are:
- Chiral carbon atoms and optical activity
- Structural isomers of alkanes, alkenes and ethers
- Chain, position and metamerism
- Cis-trans isomerism
- Representation of molecules in three dimensions
Practising Isomerism MHT CET PYQ helps candidates to understand question pattern, improve calculation speed, and identify concepts which were asked in previous exams.
Based on chapter-wise analysis of the MHT CET Chemistry paper, you can get less than 1 mark per paper by covering Isomerism. The chapter recorded 44 questions across the 80 shifts in the data, and 12 of them came in the 2025 and 2026 papers, where it contributed about 0.7% per shift.
MHT CET Isomerism Chapter: Question Count, Marks and Weightage:
| 0.55 Average questions per shift (2018-2026) | 12 Questions in the 2025 and 2026 papers (33 shifts) |
| 44 Questions in the PDF (2019-2026) | 1.1% Estimated Chemistry paper weightage (0.7% in 2025-2026) |
The PDF holds 44 questions from MHT CET 2026 to 2019, newest first, each with its exam date and shift. Options are as printed and answer keys are not included.
Isomerism PYQ Statistics (2022-2026)
The table below shows the number of questions asked in MHT CET Isomerism PYQs. Every shift has 50 Chemistry questions, so the last column is the average per shift divided by 50.
| Year | Total Questions (across shifts) | Shifts in the Data | Average per Shift | Weightage (out of 50 Chemistry Qs) |
|---|---|---|---|---|
| 2026 | 6 | 16 | 0.38 | 0.8% |
| 2025 | 6 | 17 | 0.35 | 0.7% |
| 2024 | 13 | 18 | 0.72 | 1.4% |
| 2023 | 8 | 12 | 0.67 | 1.3% |
| 2022 | 1 | 1 | 1.00 | 2.0% |
The 2018 to 2021 papers in the PDF add 10 more questions: 2021 had 6, 2020 had 1, 2019 had 3, 2018 had none.
MHT CET Isomerism Important Questions: Based on the Last 5 Years
The major types of questions asked from Isomerism in MHT CET cover the following topics:
| Topic | Questions in the PDF | Questions in 2022-2026 | Average per Shift (2022-2026) |
|---|---|---|---|
| Chiral carbons, chiral molecules and optical activity | 21 | 17 | 0.27 |
| Number of structural isomers of a formula | 9 | 6 | 0.09 |
| Types of isomerism: metamerism, position, chain and cis-trans | 9 | 6 | 0.09 |
| Other questions | 5 | 5 | 0.08 |
Pair PYQs with Other Study Material for MHT CET 2027
Click on the link to practise problems and time management skills:
| Resource | Link |
|---|---|
| MHT CET Sample Paper | Check Here |
| MHT CET Mock Test | Check Here |
Question Style in MHT CET Isomerism PYQs
Every question in this PDF is a single-correct MCQ. About half are on chiral carbons and optical activity, and most of the rest ask for a number of isomers or a type of isomerism.
| Question Style | What it Tests |
|---|---|
| Counting chiral carbons | The chiral carbons in 2-chlorobutane, in 2-bromo-3,4,5-trimethylhexane, in 3,4-dibromohexane, and in threose and ribose |
| Identifying a chiral molecule | Which of the given molecules has a chiral carbon, and which compound is NOT optically active |
| Number of isomers | The structural isomers of hexane, of an alkene with formula C₅H₁₀, of an alkane C₅H₁₂, and the metameric ethers of C₄H₁₀O |
| Type of isomerism | The isomerism shown by neopentane, by ethoxyethane and methoxypropane, and which alkenes do NOT show cis-trans isomerism |
| Enantiomers | Which property is NOT identical for enantiomers |
How to Use the Isomerism PYQ PDF for MHT CET
- Start with the 2025 and 2026 papers first, because they hold 12 of the 44 questions.
- For chiral carbons, look for a carbon attached to four different groups and mark it with a star as you go.
- For the number of isomers, build the chains from the longest down to the shortest and avoid repeating a structure.
- Solve year-wise PYQs by timing yourself, as time management is crucial.
- Re-attempt only the questions you got wrong, and note which formula or step you missed.
Video: Isomerism PYQs and MCQs
Source: Dr. Ankit Dubey CHEMISTRY
Isomerism PYQ for MHT CET Chemistry FAQs
Ques. How many questions come from Isomerism every year?
Ans. In this PDF, the questions are 6 from 2026, 6 from 2025, 13 from 2024, 8 from 2023 and 1 from 2022 and the rest from earlier papers. In 2025 and 2026 together the chapter had 12 questions across 33 shifts, about 0.36 per shift.
Ques. Which topics are asked most frequently in MHT CET Isomerism?
Ans. Chiral carbons, chiral molecules and optical activity is the largest group with 21 of the 44 questions, about 48%.
Ques. What kind of questions are asked from Isomerism?
Ans. Single-correct MCQs. Common ones ask for the number of chiral carbons in a named compound, the number of structural isomers of a formula, or the type of isomerism shown by a pair of compounds.
Ques. What is the best way to practise Isomerism PYQs?
Ans. First solve the 2025 and 2026 questions completely, then the older ones, and finally re-attempt the questions you got wrong.
Ques. Can I score full marks from Isomerism?
Ans. In 2025 and 2026 together the chapter had 12 questions across 33 shifts. Learning how to spot a chiral carbon and how to count isomers is enough to secure it. Each Chemistry question in MHT CET is worth 1 mark.
Ques. Does the Isomerism PYQ PDF include solutions?
Ans. No. The PDF contains the questions with their exam date and shift, without answer keys or solutions.
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