The ICSE Class 10 Chemistry exam 2026 has been announced, and it is to be held on 11 March 2026. In these final moments, it is important for you to focus on the most important topics for revision, and not focus on anything new. Chemistry is one of the most important subjects, as it is the most scoring and combines both theory and practical knowledge.
Other than the formulas, lab concepts and real-life applications, you need to know the weightage of each topic, so that you can prioritise the most important topics first, and in this guide, we tell you the class 10 chemistry chapters with the most weightage.
ICSE Class 10 Chemistry Question Paper And Exam Format
First, we need to understand what the exam format is when it comes to chemistry exam 2026.
The chemistry exam 2026 consists of a total of 100 marks, out of which there is a theory paper of 80 marks, and 20 marks from internal assessment. Let’s take a look at the Theory section, as that is what you will be appearing for on 11th March:
- Section A (40 Marks): This section is mandatory and contains short-answer questions covering the entire syllabus.
- Section B (40 Marks): Students are required to answer any four out of six structured long questions.
When you follow the ICSE Class 10 Chemistry syllabus according to weightage, you can score the maximum marks without putting yourself through extra burden. You can also refer to the previous year’s ICSE Class 10 Chemistry Question Paper to get an idea of the question format.
Marks Distribution of class 10 chemistry chapters in 2026
When you take a close look at the weightage and marks distribution of the ICSE Class 10 Chemistry syllabus, you will see that the marks are pretty much balanced among chapters. But, there are some sections like Organic chemistry, and the study of compounds, which seem to carry more marks than others. Let us understand it in a bit more detail.
| Chapter Name | Approximate Weightage (Marks) |
| Periodic Properties and Variations | 6 – 8 Marks |
| Chemical Bonding | 6 – 8 Marks |
| Acids, Bases, and Salts | 8 – 10 Marks |
| Analytical Chemistry | 5 – 7 Marks |
| Mole Concept and Stoichiometry | 10 – 12 Marks |
| Electrolysis | 8 – 10 Marks |
| Metallurgy | 6 – 8 Marks |
| Study of Compounds | 15 – 20 Marks |
| Organic Chemistry | 12 – 15 Marks |
ICSE Board Exam 2026 Important Resources
| Resource | Access Link |
|---|---|
| ICSE Class 10 Board Exam Date Sheet 2026 | View ICSE Class 10 Date Sheet |
| ICSE Class 10 Latest Syllabus & Subject-Wise Topics | Check ICSE Class 10 Syllabus |
| ICSE Class 10 Sample Papers with Solutions | Download ICSE Class 10 Sample Papers |
| ICSE Class 10 Answer Key & Detailed Solutions 2026 | View ICSE Class 10 Answer Key & Solutions |
ICSE Class 10 Chemistry Exam 2026 Important Questions
Now that we understand the weightage of each topic, let us take a look at some important questions that you must prepare in order to score well in the ICSE Chemistry exam 2026.
| Chapter | Important Question 1 | Important Question 2 | Important Question 3 |
| Periodic Properties and Variations | State the trend in atomic size across a period and down a group with a reason. | Explain why ionisation energy increases across a period. | Differentiate between metallic and non-metallic character with reference to the periodic table. |
| Chemical Bonding | Explain the formation of an ionic bond using sodium chloride as an example. | What is a covalent bond? Explain the formation of methane (CH₄). | What is a coordinate bond? Give an example of a compound containing it. |
| Acids, Bases and Salts | Define acids and bases according to the Arrhenius theory. | What is the pH scale? What is the pH range of strong acids and strong bases? | Explain the process of neutralisation with a chemical equation. |
| Analytical Chemistry | How can you identify carbon dioxide in the laboratory? | Describe the test for hydrogen gas. | How can chloride ions be identified using silver nitrate solution? |
| Mole Concept and Stoichiometry | Define mole and state Avogadro’s number. | Calculate the number of moles present in a given mass of a compound. | Determine the percentage composition of an element in a compound. |
| Electrolysis | Define electrolysis and electrolyte. | Explain the electrolysis of acidified water. | What is preferential discharge of ions? Give an example. |
| Metallurgy | What is the concentration of ore? Name two methods used. | Explain the difference between roasting and calcination. | Describe the extraction of iron from haematite. |
| Study of Compounds | Describe the laboratory preparation of ammonia. | State the preparation and properties of hydrogen chloride gas. | Write the uses and properties of nitric acid. |
| Organic Chemistry | What is a homologous series? Give an example. | Write the structural formula of methane and ethane. | Distinguish between saturated and unsaturated hydrocarbons. |
Preparation Tips Based on ICSE Board Class 10 Chemistry Weightage 2026
Now that you have a comprehensive list of the most important questions from each topic, it is time for you to have some last-minute preparation tips for the Chemistry exam in order to maximise your score.
Focus on Equations
Make sure that whenever you present an equation in an answer, the chemical equation must be balanced. While this sounds like an obvious tip, many students miss it.
Practice Numericals
The mole concept is a chapter that is completely based on calculations, so practice numericals whenever possible, as they fetch you the most marks.
Periodic Trends
Science students often say that chemistry is more about memorisation, and they are correct. If you have the trends like Ionization Potential and Electronegativity memorised, you can score well in the chemistry exam 2026.
Follow the Blueprint
Make sure that you follow the weightage and prepare the areas with the most weightage, so that you manage to cover the most scoring sections first.
Conclusion
By studying these important questions and following the weightage and tips, scoring well in the chemistry exam 2026 isn’t a far-off dream. Here at Aakash, we always stand by every student. All the best!
FAQs
1. How should I present answers in the ICSE Class 10 Chemistry exam to score full marks?
Presentation plays an important role in scoring well. Always write balanced chemical equations, mention the correct units in numericals, and underline key terms where needed. If a question asks for a reaction or preparation method, writing the equation along with conditions and observations can help you score better.
2. Is it necessary to memorise all chemical reactions for the ICSE Class 10 Chemistry exam?
You do not need to memorise every reaction word-for-word, but you should be familiar with the important reactions from the ICSE Class 10 Chemistry syllabus, especially from chapters like Study of Compounds and Organic Chemistry. Understanding why reactions occur often makes them easier to remember during the exam.
3. Where can students find reliable ICSE Class 10 Chemistry solutions for practice?
Students can practice questions from textbooks, sample papers, and previous board papers. Referring to ICSE Class 10 Chemistry solutions helps you understand the correct answering method, step-by-step calculations, and the format expected in board exams. This can be especially helpful when revising before the exam.
