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	Two snapdragon plants with pink flower were hybridized. The F1 plants produced red, pink, and white flowers in the proportion of 1 red, 2 pink, and 1 white. What could be the genotype of the two plants used for hybridization? (Red flower colour-RR white-rr)
	a) rr		b) Rr
	c) RR		d) RRRR

Q.3	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.4	Fill in the blank: When 480 plants are produced in the F2 generation of dihybrid cross made with pure breeding plants, the total number of plants with parental combinations obtained is __________.
	a) 300		b) 270
	c) 30		d) 180

Q.5	Which of the following is employed for harnessing the potential energy of surface water stored in a reservoir?
	a) Thermal power plant		b) Hydroelectric power plant
	c) Tidal power plant		d) Nuclear power plant

Q.6	Which of the following statements is/are true? I. The lattice structure of diamond and graphite are different. II. Graphite is an impure form of carbon while diamond is pure form. III. Graphite conducts electricity while diamond does not. IV. Graphite has a lower density than diamond.
	a) Only II		b) I and II
	c) I, II and III		d) I, III and IV

Q.7	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.8	What happens when aqueous sodium carbonate (Na2CO3) reacts with HCl(aq)?
	a) NaOH, H2(g) and CO2(g) is formed		b) NaCl, H2O and CO2(g) is formed
	c) NaHCO3, H2(g) and CO2(g) is formed		d) NaHCO3, HO2, (g) and CO2(g) is formed

Q.9	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.10	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

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.