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	Which of the following happens when a monochromatic ray of light travels from a medium of refractive index n1 to a medium of refractive index n2 (n2 > n1)?
	a) Speed increases by a factor n2/n1		b) Speed decreases by a factor n2/n1
	c) Frequency decreases by a factor n2/n1		d) Wavelength increases by a factor n2/n1

Q.2	In the following question, an assertion and a reason are given. Choose the correct option: Assertion: The magnetic force experienced by moving charge will be zero if the direction of the velocity of charge is parallel to the applied magnetic field. Reason: Force on moving charge is independent of the direction of the applied magnetic field.
	a) Both assertion and reason are CORRECT and reason is the CORRECT explanation of the assertion.		b) Both assertion and reason are CORRECT, but reason is NOT THE CORRECT explanation of the assertion.
	c) Both assertion and reason are INCORRECT.		d) Assertion is CORRECT, but the reason is INCORRECT.

Q.3	26 g of an alloy of copper and zinc reacts with H2SO4 releasing 4.48 L of H2 at STP. What is the percentage of zinc in the alloy?
	a) 10.2%		b) 76.5%
	c) 25.5%		d) 48.8%

Q.4	Consider the following statements and choose the correct option: I. RNA is double-stranded. II. RNA can be genetic or non-genetic. III. Viruses have RNA as a genetic material. IV. In RNA, uracil is present in place of thymine.
	a) Only I is incorrect		b) I and III are incorrect
	c) I, II and III are incorrect		d) II and III are incorrect

Q.5	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.6	Arrange the following in the increasing order of relative sweetness: (A) Glucose            (B) Maltose            (C) Fructose              (D) Lactose
	a) ACBD		b) DBAC
	c) ACDB		d) CADB

Q.7	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.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	Which one among the following statements is correct?
	a) All arteries carry oxygenated blood		b) All veins carry oxygenated blood
	c) Except the pulmonary artery, all other arteries carry oxygenated blood		d) Except the pulmonary vein, all other veins carry oxygenated blood

Q.10	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

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.