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	When SO2 is passed through a solution of K2Cr2O7 turns green. Which of the following correctly shows the change in the oxidation state of chromium and sulphur?
	a) +3 to +6 and +4 to +2 respectively		b) +6 to +3 and +4 to +6 respectively
	c) +4 to +6 and +4 to -2 respectively		d) No change in 0 states

Q.3	In the following question, an assertion and a reason are given. Choose the correct option: Assertion (A): Children necessarily possess the same blood group as either of the parents. Reason (R): The gene corresponding to the blood group has three alleles.
	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.4	Choose the correct option and complete the following sentence: Sexual reproduction causes genetic variation because of _____________. blending of genes chromosomal changes shuffling of genes
	a) Only 1		b) Only 2
	c) Only 3		d) All of the above

Q.5	Which of the statements given below are correct? I. Ohm's law is not applicable at very low and very high temperature. II. Ohm's law is applicable to the semiconductor. III. Ohm's law is not applicable to electron tubes, discharge tubes and electrolytes. IV. If a 24-volt battery is connected to a 6-ohm resistor, the current passing through the resistor is 4 A.
	a) I, II and III		b) I, II and IV
	c) I, III and IV		d) I, II, III and IV

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	Match the entries of Column I with those of Column II:   Column I   Column II 1.     Stomata a.     Anaerobic respiration 2.     Mangrove trees b.     Intake of CO2 3.     Wood stem c.      Pneumatophores 4.     Yeast d.     Lenticels
	a) 1 – b, 2 – c, 3 – d, 4 – a		b) 1 – b, 2 – a, 3 – d, 4 – c
	c) 1 – d, 2 – a, 3 – c, 4 – b		d) 1 – a, 2 – b, 3 – c, 4 – d

Q.8	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.9	Length and diameters of four wires of same material are given below. The resistance of which of the following wires will be minimum?
	a) L and D		b) 2 L and D
	c) (L/2) and 2D		d) 2 L and (D/2)

Q.10	What happens when 1 mole of ethyne undergoes complete combustion?
	a) 2 moles of carbon monoxide and half-mole of water are formed		b) 4 mole of carbon dioxide and 1 mole of water are formed
	c) 2 mole of carbon dioxide and 1 mole of water are formed		d) 2 moles of carbon dioxide and 2 moles of water are formed

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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.