The Central Board of Secondary Education (CBSE) will hold the Class 10 Science exam for 2026 on February 25, 2026 . The exam will be for 80 marks and run from 10:30 AM to 01:30 PM . This article provides important 3-mark questions for students preparing for the CBSE Class 10 Science 2026 examination. These questions are taken from previous years' papers to help students practice and get good results.
CBSE Class 10 Science 2026 Exam Details
| Exam Name | CBSE Class 10 Science Exam 2026 |
| Exam Date | February 25, 2026 |
| Total Marks | 80 |
| Exam Duration | 3 hours (10:30 AM to 01:30 PM) |
Important 3-Mark Questions for Science
For the CBSE Class 10 Science exam, 3-mark questions are very important. They test your understanding of key concepts and your ability to explain them clearly. Experts have gathered important 3-mark questions from previous year's papers to help students practice. Solving these questions helps in understanding common topics and improving how you write answers. Here are some examples of the types of questions you should prepare for from different chapters:
Chapter-wise Example Questions
- Chemical Reactions and Equations: (a) Define rusting. (b) Why do people apply paint on iron articles?
- Acid, Bases, and Salts: (a) An aqueous solution has a pH value of 7.0. Is this solution acidic, basic, or neutral? (b) If H+ concentration of a solution is 1 x 10⁻² mol L⁻¹, what will be its pH value?
- Metals and Non-metals: (a) Why is ZnO called an amphoteric oxide? Name another amphoteric oxide. (b) What are alkalis? Give one example of an alkali.
- Carbon and Its Compounds: What is meant by denatured alcohol? What is the need to denature alcohol?
- Life Processes: What are the functions of lymph in our body? How is haemoglobin linked with respiration? Explain.
- Control and Coordination: What happens at the synapse between two neurons? What is the need for a system of control and coordination in an organism?
- How do Organisms Reproduce?: Describe sexually transmitted diseases (STDs) and mention ways to prevent them. Name the surgical methods of birth control in human males and females respectively.
- Heredity: What is fossilization? How are fossils formed? What are homologous and analogous organs? Explain with an example.
- Human Eye and Colourful World: Explain presbyopia. State its causes. How is presbyopia of a person corrected? Why do stars twinkle?
- Electricity: On what factors does the resistance of a conductor depend? How much energy is given to each coulomb of charge passing through a 6-volt battery?
- Magnetic Effects of Electric Current: What is the function of an earth wire? Why is it necessary to earth the metallic casing of electric appliances? What is the principle of the electric motor?
- Our Environment: DDT sprayed in small amounts on food plants was detected in high concentrations in humans. How did it happen? Explain. Describe how the ozone layer is formed.
Students should solve these questions and similar ones to practice well and get good results in the CBSE Class 10 Science exam 2026. Consistent practice with previous year questions can significantly help in exam preparation.
