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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
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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 |
Which of the following equations is not an example of displacement reaction? |
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Q.2 |
Match the entries of Column I with those of Column II:
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Q.3 |
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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Q.4 |
Match column I with column II and select the correct answer using the codes given below:
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Q.5 |
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. |
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Q.6 |
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 ___________. |
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Q.7 |
Which environmental hazard is not contributed by the combustion of fossil fuels? |
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Q.8 |
Refer to the given diagram and select the incorrect option regarding X and Y: ![]() |
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Q.9 |
Identify the reaction which takes place at the anode when an aqueous solution of CuSO4 is electrolysed using platinum as anode: |
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Q.10 |
Identify the correct sequence of fractions obtained when petroleum is subjected to fractional distillation:
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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 -
Students can also refer to the following resources to level up their CREST Science Olympiad (CSO) exam preparation for class 10 -
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 : b | Q.2 : a | Q.3 : b | Q.4 : b | Q.5 : a | Q.6 : a | Q.7 : c | Q.8 : a | Q.9 : b | Q.10 : c