CREST Science Olympiad Class 10 Sample Papers

Sample PDF of CREST Science Olympiad for Class 10:

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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


Identify the phenomenon by which a new set of the population is formed from the change in the frequency of some genes:


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.


What happens when 1 mole of ethyne undergoes complete combustion?


Choose the correct option and complete the following sentence:

Sexual reproduction causes genetic variation because of _____________.

  1. blending of genes
  2. chromosomal changes
  3. shuffling of genes


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:


Consider the following reaction:

2CaO + C → CaC2 + 2CO
2CaC2 + 2H2O → X + Y

If X is involved in the neutralization reaction with acid, then Y may be:


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?


Fill in the blank:

When a ray of light falls on a transparent glass plate, a part of it is reflected and a part is refracted. The reflected and refracted rays can be perpendicular to each other for ____________.


Choose the correct option and complete the following sentence:

An electric motor consists of ____________.
I. rectangular coil of insulated copper wire
II. two poles of a magnetic field
III. split rings
IV. conducting brushes


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?

Your Score: 0/10

Answers to Sample Questions from CREST Olympiads:


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