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	Consider the following statement: 1. A person with myopia can see distant objects distinctly but cannot see nearby objects clearly. 2. A person with hypermetropia cannot see distant objects clearly. 3. A person with presbyopia can see nearby objects without corrective glasses. Which of the statement given above is/are not correct?
	a) 1, 2 and 3		b) 1 and 2 only
	c) 2 and 3 only		d) 3 only

Q.2	Which of the following acidic salt can react with one mole of base?
	a) NaH2PO3		b) Na2HPO3
	c) (NH4)2CO3		d) CH3COOK

Q.3	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.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	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.6	Match the following: Function of blood vessels Entering/leaving blood vessels (i) It carries the blood from the upper part of the body. (a) Hepatic artery (ii) It carries oxygenated blood to all the parts of the body. (b) Renal veins (iii) It supplies oxygenated blood to the liver from the aorta.  (c) Pulmonary artery (iv) It transports the blood from the kidney to the posterior vena cava for its purification. (d) Superior vena cava (v) It carries the deoxygenated blood from the right ventricle to the lungs for purification. (e) Aorta
	a) i-d, ii-e, iii-a, iv-c, v-b		b) i-c, ii-e, iii-a, iv-b, v-d
	c) i-d, ii-e, iii-a, iv-b, v-c		d) i-b, ii-e, iii-a, iv-d, v-c

Q.7	Consider the following balanced equation and identify a, b, c and d: aFe2O3 + bH2 → cFe + dH2O
	a) a-1, b-1, c-2, d-3		b) a-1, b-1, c-1, d-1
	c) a-1, b-3, c-2, d-3		d) a-1, b-2, c-2, d-3

Q.8	A reactive metal (M) is treated with H2SO4(dil). The gas is evolved and is collected over the water as shown in the figure. What conclusion can be drawn from the above experiment?
	a) The gas evolved is hydrogen.		b) The gas evolved is lighter than air.
	c) The gas evolved is O2 and is lighter than air.		d) Both (a) and (b)

Q.9	Study the reaction given: C2H5ONa + A → C2H5-O-CH3 + NaBr Identify which of the following reactions produces 'A':
	a) Ethane with HBr		b) Methyl alcohol with PBr5
	c) Ethyl alcohol with PBr3		d) Ethane with excess of bromine in the presence of sunlight

Q.10	Arrange the following compounds in the decreasing order of covalency of the non-metallic elements: A) PCl5 B) NCl3 C) CH4 D) SO3 E) Cl2O7
	a) EDACB		b) BCADE
	c) ECADB		d) BDACE

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.