CREST Science Olympiad Class 10 Previous Year Papers

CREST Science Olympiad Previous Year Paper PDF 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


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


Which of the following is obtained in its pure form by the reaction of sugar and sulphuric acid?


Length and diameters of four wires of same material are given below. The resistance of which of the following wires will be minimum?


If I1 is the first ionization potential, I2 is the second ionization potential, I3 is the third ionization potential and I4 is the fourth ionization potential of an element, then which of the following has the least value?


Which of the following statements is correct regarding grafting process?


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


Arrange the following in the increasing order of ease of oxidation:

(A) SO4-2         (B) F-1            (C) Br-1        (D) OH-


In the following question, an assertion and a reason are given. Choose the correct option:

Assertion: According to Döbereiner's, a group of three similar elements arranged in their increasing atomic weights show that the atomic weight of middle is equal to the arithmetic mean of the other two elements.

Reason: Atomic weight is equal to one-twelfth of the mass of a carbon atom.


Which of the following statements correctly describe the concept of sustainable development?

(i) Planned growth with minimum damage to the environment
(ii) Growth irrespective of the extent of damage caused to the environment
(iii) Stopping all developmental work to conserve the environment
(iv) Growth that is acceptable to all the stakeholders


When a person walking in bright sunlight enters a dark room, he is not able to see clearly for a little while.

Identify the correct reason for the above statement:

Your Score: 0/10

Answers to Previous Year Questions from CREST Olympiads:


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 -> Dashboard -> Additional Practice -> Buy & new users can visit
  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.

Answers to Previous Year Questions from CREST Olympiads:

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