CREST Science Olympiad Class 10 Sample Paper

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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

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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 (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.

Q.2

Which environmental hazard is not contributed by the combustion of fossil fuels?

Q.3

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.

Q.4

Which of the following metals cannot be refined by electrolytic refining?

(i) Au
(ii) Cu
(iii) Na
(iv) K

Q.5

Fill in the blank:

An electric current through a horizontal metal wire flows in East to West direction, the direction of the magnetic field at a point directly above it is from ___________.

Q.6

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?

Q.7

It is possible to measure the passage of 50 electrons per sec with a certain sensitive device. This corresponds to a current of:

Q.8

Fill in the blank:

Bronze is often used to make statues and medals whereas brass is used in making utensils, scientific apparatus and cartridges. Both brass and bronze are copper-containing alloys, yet they differ in their chemical composition for additionally containing ___________.

Q.9

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.

Q.10

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 _________.

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Answers to Sample Questions from CREST Olympiads:

Q.1dQ.2cQ.3cQ.4dQ.5dQ.6dQ.7aQ.8aQ.9aQ.10b

Practicing sample papers for the CREST Science Olympiad for class 10 is the most effective way to achieve the highest possible score in the exams. Students learn to manage time and solve questions within the time limits by practicing sample papers. Science Olympiad previous years’ question papers for class 10 are considered to be the best means to know the variety and types of questions well that you might come across. Students willing to participate in the CREST Olympiad exams require to have a thorough understanding of the exam pattern which is only possible with regular practice of sample papers. CREST Olympiads makes available Science Olympiad previous year papers online for free download. 

Answers to Sample Questions from CREST Olympiads:

Q.1 : d | Q.2 : c | Q.3 : c | Q.4 : d | Q.5 : d | Q.6 : d | Q.7 : a | Q.8 : a | Q.9 : a | Q.10 : b

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