CREST Science Olympiad Class 10 Previous Year Papers

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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

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: The magnetic field produced by a current-carrying solenoid is independent of its length and cross-section area. Reason: The magnetic field inside the solenoid is uniform.
	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	Fill in the blank: When Ca(NO3)2 is heated, it gives CaO, NO2(g) and O2(g). The correct number of moles of Ca(NO3)2, CaO, NO2(g) and O2(g) are present in the reaction are respectively _________.
	a) 2, 1, 3, 2		b) 2, 2, 4, 1
	c) 2, 2, 2, 1		d) 1, 2, 4, 1

Q.3	Arrange the following in the increasing order of ease of oxidation: (A) SO4-2         (B) F-1            (C) Br-1        (D) OH-
	a) A B D C		b) B C D A
	c) C D B A		d) A B C D

Q.4	In the following question, an assertion and a reason are given. Choose the correct option: Assertion (A): In any food chain, the number of organisms in any trophic level should always be less than that in its previous trophic level. Reason (R): Only 10 percent of total energy present in a trophic level is transferred to the next trophic level in any food chain.
	a) Both A and R are true and R is the correct explanation for A		b) Both A and R are true, but R is not the correct explanation for A
	c) A is true and R is false		d) A is false and R is true

Q.5	Which of the following metals cannot be refined by electrolytic refining? (i) Au (ii) Cu (iii) Na (iv) K
	a) (i) and (ii)		b) (i) and (iii)
	c) (ii) and (iii)		d) (iii) and (iv)

Q.6	It is possible to measure the passage of 50 electrons per sec with a certain sensitive device. This corresponds to a current of:
	a) 8 x 10-18 A		b) 1.6 x 10-20 A
	c) 8 x 10-20 A		d) 1.6 x 10-19 A

Q.7	Label A, B, C and D in the following diagram:
	a) A-Chloroplast, B-Guard cell, C-Air spaces, D-Upper epidermis		b) A-Air spaces, B-Guard cell, C-Chloroplast, D-Epidermis
	c) A-Guard cells, B-Air spaces, C-Chloroplast, D-Upper epidermis		d) A-Epidermis, B-Guard cells, C-Air spaces, D-Chloroplast

Q.8	In the following question, an assertion and a reason are given. Choose the correct option: Assertion: In a simple electric circuit, the positive terminal of the battery is a point of lowest potential. Reason: The electronic current flow in a circuit is from a point of highest potential to a point of lowest potential.
	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) Both assertion and reason are correct.

Q.9	Which of the following statements correctly describes the concept of sustainable development? Planned growth with minimum damage to the environment Growth irrespective of the extent of damage caused to the environment Stopping all developmental work to conserve the environment Growth that is acceptable to all the stakeholders
	a) i and iv		b) ii and iii
	c) ii and iv		d) iii and iv

Q.10	Which of the following equations is not an example of displacement reaction?
	a) 2Al + Fe2O3 → Al2O3 + 2Fe		b) Ca + Cl2 → CaCl2
	c) 2Kl + Cl2 → 2KCl + l2		d) 2Na + 2H2O → 2NaOH + H2

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Students can find the most recent CREST Science Olympiad previous year paper pdf for class 10 on this page. The pdf is easily downloadable & answer key for all the questions is also provided on the last page.

CREST Science Olympiad previous year papers become quite useful while preparing for the CREST Science Olympiad exam. Below are some advantages of referring to the previous year papers -

1. Students get to understand the types of questions that come in the CREST Science Olympiad exam.
2. Practicing previous years’ papers help students to get to know their strengths and weaknesses.
3. Students become capable of effectively managing their time in the exam by practicing previous years' papers multiple times.

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.