CREST Science Olympiad Class 10 Previous Year Paper

Getting ready for the Class 10 Science Olympiad? Practising with previous year question papers is one of the smartest ways to prepare. These papers help students understand the level of questions asked and focus on the most important concepts during revision.

Why These Papers Are a Must-Have

• They include questions from vital topics like Chemical Reactions and Equations, Acids, Bases and Salts, Metals and Non-metals etc.
• They help improve speed, accuracy, and confidence when solving science problems under exam conditions.
• Each paper comes with an answer key, making self-assessment easy and effective.

Download the Science Olympiad Previous Year Paper for Class 10 (PDF) and help your child revise smarter, practice better, and perform their best on exam day.

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Syllabus:

Section 1: Chemical Reactions and Equations, Acids, Bases and Salts, Metals and Non-metals, Carbon and its Compounds, Periodic Classification of Elements, Life Processes, Reproduction in Organisms, Heredity and Evolution, Light-Reflection and Refraction, Human Eye and Colourful World, Electricity, Magnetic Effects of Electric Current, Sources of Energy, Our Environment and its Management.

Achievers Section: Higher Order Thinking Questions - Syllabus as per Section 1

Sample Paper Previous Year Paper Marking Scheme Free Study Material

Previous Year Questions

Q.1

Q.2

Q.3

Q.4

Q.5

Q.6

Q.7

Q.8

Q.9

Q.10

Q.1	In the following question, an assertion and a reason are given. Choose the correct option: Assertion: Graphite is slippery to touch. Reason: The various layers of carbon atoms in graphite are held together by weak van der Waal's forces.
	a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion		b) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion
	c) Assertion is true, but Reason is false		d) Assertion is false, but Reason is true

Q.2	A student connects a coil of wire with a sensitive galvanometer as shown in figure. He will observe the deflection in the galvanometer if bar magnet is:
	a) placed near one of the faces of the coil and parallel to the axis of the coil		b) moved towards or away from the coil parallel to the axis of the coil
	c) placed inside the coil		d) placed near one of the faces of the coil and perpendicular to the axis of the coil

Q.3	The magnetic field intensity of an electromagnet depends on which of the following parameter? I. Number of turns of the solenoid II. Nature of the core substance III. The magnitude of electric current IV. The shape of the core
	a) I and III		b) II and IV
	c) I, II and III		d) I, II, III and IV

Q.4	Fill in the blank: An electric kettle has two thermal coils A and B. When current is passed through A, water in the kettle boils in 6 minutes. When current is passed through B, the same volume of water in the kettle boil in 8 minutes. If both A and B are joined in series and current is passed, water will boil in _______________.
	a) 14 minutes		b) 7 minutes
	c) 24 minutes		d) 28 minutes

Q.5	The Red Data Books published by the International Union for Conservation of Nature and Natural Resources (IUCN) contains lists of which of the following?
	a) Endemic plant and animal species present in the biodiversity hot spots.		b) Threatened plant and animal species
	c) Protected sites for conservation of nature and natural resources in various countries.		d) None of the above

Q.6	K+, Ar, Ca2+ and S2- have:
	a) Same electronic configuration and atomic volume		b) Different electronic configuration but same ionisation potential
	c) Same electronic configuration but different atomic volume		d) Same electronic configuration and same ionisation potential

Q.7	When Peter rotated a plane mirror through an angle of 60o, the reflected ray turned through the angle 120o. What will happen to the size of the image during this rotation?
	a) Doubled		b) Halved
	c) Remains the same		d) Becomes infinite

Q.8	The ciliary muscles can change the focal length of the eye lens. Find the ratio of the focal length of the eye lens when it is focused on two different objects, one at a distance of 2 m and the other at a distance of 1 m. The diameter of the normal eye is 2.5 cm.
	a) 82 : 81		b) 81 : 82
	c) 78 : 81		d) 81 : 78

Q.9	Hydrogen chloride and SO2 are the side products in the reaction of ethanol and thionyl chloride. Which of the following is the main product in this reaction?
	a) C2H5OC2H5		b) C2H6
	c) CH5Cl		d) C2H5Cl

Q.10	Two particles having charges q1 and q2 when kept at a certain distance, exert a force F on each other. If the distance between the two charges is reduced to half and the charge on each particle is doubled then the force exerted on each other would be:
	a) 2 F		b) 4 F
	c) 8 F		d) 16 F

Your Score: 0/10

Additional Preparation Resources

Students can also refer to the following resources to level up their CREST Science Olympiad (CSO) exam preparation for class 10 -

1. CREST Science Worksheets Package for class 10 - It is a package of 5 worksheets. The worksheets are in the same pattern as the previous year paper. Hence, very useful for preparation. Existing users can purchase additional practice worksheets by following these steps: Login at https://www.crestolympiads.com/login -> Dashboard -> Additional Practice -> Buy & new users can visit https://www.crestolympiads.com/registration
2. CREST Science Olympiad book for class 10 - The book covers topic-wise reading material, chapter-wise practice questions with answer key & contains the previous year paper. The book is available in both physical and pdf formats. Proceed now to purchase the Olympiad book. Also, students can view & download the first chapter of the Science Olympiad book for class 10 for free.

Note: Don’t forget to download the CREST Science Olympiad past year paper pdf for class 10.