CBSE Class 10 Science sample papers and practice questions
Sample papers work best after you have revised each chapter. Below are a few Science MCQs with answers to check yourself. LerkAI can then create a full practice paper in your board's style for any mix of the 16 chapters, time you, and explain every wrong answer. These are practice papers made by LerkAI, not official CBSE papers, so also solve your board's official sample papers.
How to use this page
- Choose the chapters you have finished revising.
- Generate a timed practice paper with board-style marks.
- Attempt it in one sitting without notes.
- Read the explanation for every wrong answer and practise your weakest chapter again.
Practice questions with answers
The SI unit of electric current is:
Answer: Ampere. Current is measured in ampere (A); volt is potential difference and ohm is resistance.
Which gas is released when zinc reacts with dilute hydrochloric acid?
Answer: Hydrogen. Zn + 2HCl → ZnCl₂ + H₂. Metals displace hydrogen from dilute acids.
The power of a lens of focal length +50 cm is:
Answer: +2 D. P = 1/f (in metres) = 1/0.5 = +2 D.
Chapters
- Chemical Reactions and Equations
- Acids, Bases and Salts
- Metals and Non-metals
- Carbon and Its Compounds
- Periodic Classification of Elements
- Life Processes
- Control and Coordination
- How do Organisms Reproduce?
- Heredity and Evolution
- Light – Reflection and Refraction
- Human Eye and Colourful World
- Electricity
- Magnetic Effects of Electric Current
- Sources of Energy
- Our Environment
- Management of Natural Resources
Frequently asked questions
Are these official CBSE sample papers?
No. LerkAI creates practice papers in a board-like pattern. Always also solve the official CBSE sample papers.
How many questions can a practice test have?
You can create practice tests with up to 100 questions and an optional timer.
Does LerkAI explain wrong answers?
Yes. After each test you get an explanation for every question you got wrong.