CREST Science Olympiad Class 10 Previous Year Papers

CREST Science Olympiad Previous Year Paper PDF for Class 10:

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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

Q.1

Q.2

Q.3

Q.4

Q.5

Q.6

Q.7

Q.8

Q.9

Q.10

Q.1	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.2	In the following question, an assertion and a reason are given. Choose the correct option: Assertion (A): A person, who had 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 remember the microbes causing smallpox and respond vigorously on 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	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.4	Identify the phenomenon by which a new set of the population is formed from the change in the frequency of some genes:
	a) Genetic drift		b) Organic evolution
	c) Variations		d) Speciation

Q.5	When current flows in a long straight solenoid, north and south poles are created at the two ends. Which of the following statements is/are correct?
	a) The field lines inside the solenoid are in the form of straight lines which indicate that the magnetic field is the same at all points inside the solenoid.		b) The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron when placed inside the coil.
	c) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet.		d) Both a and b

Q.6	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.7	An air bubble in a glass slab (μ = 3/2) is 6 cm deep when viewed from one face and 3 cm deep when viewed from the opposite face. Determine the thickness of the slab:
	a) 9 cm		b) 13.5 cm
	c) 15 cm		d) 18 cm

Q.8	What volume of hydrogen gas at 273 K and 1 atm pressure will be consumed in obtaining 21.6 g of boron (At. mass: 10.8) from the reduction of BCl3 by hydrogen?
	a) 89.6 L		b) 67.2 L
	c) 44.8 L		d) 22.4 L

Q.9	Why shouldn't we light a candle in a closed room with people?
	a) The CO2 formed causes breathlessness.		b) Carbon particles are formed which are dangerous for respiratory tract.
	c) Methane gas, which is poisonous, is formed.		d) Carbon monoxide gas which reduces the ability of blood to carry oxygen is formed.

Q.10	Identify the correct sequence of fractions obtained when petroleum is subjected to fractional distillation: (1) Lubricating oil (2) Petrol (3) Petroleum ether (4) Diesel oil
	a) 2, 3, 4, 1		b) 3, 2, 4, 1
	c) 3, 2, 1, 4		d) 2, 4, 3, 1

Your Score: 0/10

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.