Oxidation Number is a topic from the Redox Reactions chapter of Class 11 Chemistry, and it is part of the Chemistry section of the MHT CET for candidates who are preparing for the PCM (Physics, Chemistry, and Mathematics).
The key topics covered in Oxidation Number PYQs are:
- Oxidation number of an element in a compound or ion
- Average oxidation number
- Oxidation number in compounds of xenon and fluorine
- Change in oxidation number in a reaction
Practising Oxidation Number 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 about 1 mark per paper by covering Oxidation Number. The chapter recorded 39 questions across the 80 shifts in the data, and 20 of them came in the 2025 and 2026 papers, where it contributed about 1.2% per shift.
MHT CET Oxidation Number Chapter: Question Count, Marks and Weightage:
| 0.49 Average questions per shift (2018-2026) | 20 Questions in the 2025 and 2026 papers (33 shifts) |
| 39 Questions in the PDF (2018-2026) | 1.0% Estimated Chemistry paper weightage (1.2% in 2025-2026) |
The PDF holds 39 questions from MHT CET 2026 to 2018, newest first, each with its exam date and shift. Options are as printed and answer keys are not included.
Oxidation Number PYQ Statistics (2022-2026)
The table below shows the number of questions asked in MHT CET Oxidation Number 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 | 9 | 16 | 0.56 | 1.1% |
| 2025 | 11 | 17 | 0.65 | 1.3% |
| 2024 | 9 | 18 | 0.50 | 1.0% |
| 2023 | 2 | 12 | 0.17 | 0.3% |
| 2022 | 0 | 1 | 0.00 | 0.0% |
The 2018 to 2021 papers in the PDF add 8 more questions: 2021 had none, 2020 had 2, 2019 had 5, 2018 had 1.
MHT CET Oxidation Number Important Questions: Based on the Last 5 Years
The major types of questions asked from Oxidation Number in MHT CET cover the following topics:
| Topic | Questions in the PDF | Questions in 2022-2026 | Average per Shift (2022-2026) |
|---|---|---|---|
| Average and fractional oxidation numbers and unknown compounds | 4 | 4 | 0.06 |
| Change in oxidation number during a reaction | 3 | 3 | 0.05 |
| Oxidation number of an element in a compound or ion | 32 | 24 | 0.38 |
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 Oxidation Number PYQs
Every question in this PDF is a single-correct MCQ. Most ask for the oxidation number of one element in a given compound or ion.
| Question Style | What it Tests |
|---|---|
| Oxidation number of an element | The oxidation state of Xe in XeOF₄, of Cl in HOClO, of S in SO₃²⁻ and in H₂S₂O₇, and of As in H₃AsO₃ |
| Oxidation number of oxygen | The oxidation number of oxygen in KO₂ |
| Average oxidation number | The average oxidation number of carbon in carbon suboxide C₃O₂ |
| Unknown compounds | A compound of Xe and F in the atomic ratio 0.4 : 2.4, and a compound of three elements with oxidation numbers +3, +5 and -2 |
| Change in oxidation number | The change in oxidation number of the oxidising agent in a reaction of H₃AsO₃, and of Mn when acidified potassium permanganate is decolourised |
How to Use the Oxidation Number PYQ PDF for MHT CET
- Start with the 2025 and 2026 papers first, because they hold 20 of the 39 questions.
- Take the sum of the oxidation numbers of all atoms equal to the charge on the species, and solve for the unknown.
- For fractional values, find the average over all atoms of that element.
- 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: Oxidation Number PYQs and MCQs
Source: Equilibrium Science Hub
Oxidation Number PYQ for MHT CET Chemistry FAQs
Ques. How many questions come from Oxidation Number every year?
Ans. In this PDF, the questions are 9 from 2026, 11 from 2025, 9 from 2024, 2 from 2023 and 2 from 2020 and the rest from earlier papers. In 2025 and 2026 together the chapter had 20 questions across 33 shifts, about 0.61 per shift.
Ques. Which topics are asked most frequently in MHT CET Oxidation Number?
Ans. Oxidation number of an element in a compound or ion is the largest group with 32 of the 39 questions, about 82%.
Ques. What kind of questions are asked from Oxidation Number?
Ans. Single-correct MCQs that ask for the oxidation number of one element in a compound or ion, an average oxidation number, or the change in oxidation number in a reaction.
Ques. What is the best way to practise Oxidation Number 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 Oxidation Number?
Ans. In 2025 and 2026 together the chapter had 20 questions across 33 shifts. Learning the rules for oxidation numbers is enough to secure it. Each Chemistry question in MHT CET is worth 1 mark.
Ques. Does the Oxidation Number PYQ PDF include solutions?
Ans. No. The PDF contains the questions with their exam date and shift, without answer keys or solutions.
Comments