CBSE Class 12 Chemistry043
1 paper70 marks3 h
What we predict comes up
From the syllabus weighting and how the papers are usually set. The papers below follow it.
- Electrochemistry13%Electrochemistry is the heaviest unit at 9 of 70 marks; expect a Nernst equation numerical and Kohlrausch's law or electrolysis.
- Aldehydes, Ketones and Carboxylic Acids11%Aldehydes, Ketones and Carboxylic Acids is 8 of 70 marks; a 5-mark identification problem with tests and named reactions is likely.
- Solutions10%Solutions carries 7 of the 70 theory marks in CBSE's 2025-26 unit-wise weighting; colligative property numericals with the van't Hoff factor recur.
- Chemical Kinetics10%Chemical Kinetics is 7 of 70 marks; first order half-life and Arrhenius calculations are the usual pattern, often as the case-based question.
Theory paper
3 h · 70 marks · No calculator
- There are 33 questions in this question paper. All questions are compulsory.
- Section A has 16 multiple choice questions of 1 mark each, Section B has 5 very short answer questions of 2 marks each, Section C has 7 short answer questions of 3 marks each, Section D has 2 case-based questions of 4 marks each and Section E has 3 long answer questions of 5 marks each.
- Use of log tables and calculators is not allowed. Any values you need are given in the question.
Answer or mark a question and your score adds up here.
33 questions
Every paper, every question, the answers and the mark scheme. Free with a Knomi account.
Not included: The practical examination (30 marks) is not included, and where the real paper prints an internal choice ("either A or B") only one version of the question is given.
CBSE Class 12 Chemistry study checklist
Revise in this order: the topics worth the most marks first. Tick a topic off when you can answer its questions in the paper above without notes.
- Electrochemistry · about 13% of the marksElectrochemistry is the heaviest unit at 9 of 70 marks; expect a Nernst equation numerical and Kohlrausch's law or electrolysis.
- Aldehydes, Ketones and Carboxylic Acids · about 11% of the marksAldehydes, Ketones and Carboxylic Acids is 8 of 70 marks; a 5-mark identification problem with tests and named reactions is likely.
- Solutions · about 10% of the marksSolutions carries 7 of the 70 theory marks in CBSE's 2025-26 unit-wise weighting; colligative property numericals with the van't Hoff factor recur.
- Chemical Kinetics · about 10% of the marksChemical Kinetics is 7 of 70 marks; first order half-life and Arrhenius calculations are the usual pattern, often as the case-based question.
- d- and f-Block Elements · about 10% of the marksd- and f-Block Elements is 7 of 70 marks; trends, magnetic moments and dichromate or permanganate equations are routine.
- Coordination Compounds · about 10% of the marksCoordination Compounds is 7 of 70 marks; IUPAC naming, VBT and crystal field explanations come up every year.
- Biomolecules · about 10% of the marksBiomolecules is 7 of 70 marks; glucose reactions, protein structure and denaturation suit a case-based question.
- Haloalkanes and Haloarenes · about 9% of the marksHaloalkanes and Haloarenes is 6 of 70 marks; SN1 and SN2 reasoning and reasons-based questions dominate.
- Alcohols, Phenols and Ethers · about 9% of the marksAlcohols, Phenols and Ethers is 6 of 70 marks; named reactions, acidity of phenols and ether cleavage.
- Amines · about 9% of the marksAmines is 6 of 70 marks; basicity order, conversions and the Hinsberg test are the common asks.
Questions
What topics come up most in CBSE Class 12 Chemistry?
Our prediction: Electrochemistry (about 13% of the marks), Aldehydes, Ketones and Carboxylic Acids (about 11% of the marks), Solutions (about 10% of the marks). The full list with the reason for each is at the top of this page.
When is the CBSE Class 12 Chemistry exam?
CBSE Class 12 is sat February to April. Central Board of Secondary Education publishes the exact timetable for each sitting; check it for your paper's date.
How many papers are there, and how long are they?
One paper: Theory paper (3 hours, 70 marks). That is 3 hours and 70 marks in all.
Can I use a calculator?
In this format a calculator is not allowed. Check your board's current rules before the exam.
Are these the real CBSE Class 12 Chemistry papers?
No. They are predicted papers written by us in the real format, with original questions, not copies of past papers. Use them alongside the official past papers and specimen papers from Central Board of Secondary Education.
Is it free?
Yes. The outline, the predictions and the first questions are open to everyone; every paper, the answers and the mark scheme are free with a Knomi account.
More CBSE Class 12 subjects
Chemistry on other boards
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