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	Which of the following statements about carbon is/are correct? A. It has a small atomic size. B. Its melting and boiling point is low as compared to other members of the group. C. It shows the electropositive character. D. It shows the maximum tendency of catenation.
	a) A and B correct		b) B and D correct
	c) A, C and D correct		d) A and D correct

Q.2	In the following question, an assertion and a reason are given. Choose the correct option: Assertion (A): A person, who has suffered from smallpox can be recommended for providing nursing care to the victims of smallpox than the person who hadn't suffered from smallpox. Reason (R): The immune system of the person who had suffered from smallpox remembers the microbes causing smallpox and responds vigorously on the next encounter.
	a) Both (A) and (R) are true and (R) is the correct explanation of (A)		b) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
	c) (A) is true, but (R) is false		d) Both (A) and (R) are false

Q.3	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.4	Which of the following statements is correct regarding the grafting process?
	a) The rooted plant that is cut in a slanting manner is known as a scion.		b) The part of a stem that is cut in a slanting way is called stock.
	c) This is a natural method of vegetative reproduction.		d) Grafting is practised for mango and citrus plants.

Q.5	Which of the following equations is the summary of photosynthesis?
	a) 6CO2 + 12H2O → C6H12O6 + 6O2 + 6H2O		b) 6CO2 + H2O + Sunlight → C6H12O6 + O2 + 6H2O
	c) 6CO2 + 12H2O + Chlorophyll + Sunlight → C6H12O6 + 6O2 + 6H2O		d) 6CO2 + 12H2O + Chlorophyll → C6H12O6 + 6CO2 + 6H2O

Q.6	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.7	In the following question, an assertion and a reason are given. Choose the correct option: Assertion (A): Generally, the colour of indicators changes in a particular pH range. Reason (R): Indicators are weak acids or weak bases and exhibit different colours in molecular form and ionic form.
	a) Both A and R are true and R is the correct explanation of A		b) Both A and R are true, but R is not the correct explanation of A
	c) A is true and R is false		d) A is false and R is true

Q.8	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

Q.9	A convex mirror of focal length f produces an image 1/nth of the size of the object. Calculate the distance of the object from the mirror:
	a) (n + 1)/n f		b) (n + 1)f
	c) (n -1)f		d) (n -1/n)f

Q.10	Consider the following reaction: 2CaO + C → CaC2 + 2CO 2CaC2 + 2H2O → X + Y If X is involved in the neutralisation reaction with acid, then Y may be:
	a) CH4		b) C2H2
	c) Ca(OH)2		d) CaH2

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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.