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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 |
Q.1 |
Which of the following would stop evolution by natural selection from occurring? |
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Q.2 |
Arrange the following in the increasing order of ease of oxidation: (A) SO4-2 (B) F-1 (C) Br-1 (D) OH- |
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Q.3 |
In the following question, an assertion and the reason are given. Choose the correct option: Assertion (A): In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group. |
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Q.4 |
What happens when 1 mole of ethyne undergoes complete combustion? |
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Q.5 |
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.6 |
Refer to the given diagram and select the incorrect option regarding X and Y: ![]() |
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Q.7 |
Which environmental hazard is not contributed by the combustion of fossil fuels? |
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Q.8 |
Identify the phenomenon by which a new set of the population is formed from the change in the frequency of some genes: |
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Q.9 |
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. |
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Q.10 |
In the following question, an assertion and a reason are given. Choose the correct option: Assertion (A): A person, who has 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 remembers the microbes causing smallpox and responds vigorously on the next encounter. |
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Answers to Sample Questions from CREST Olympiads:
Q.1 : d | Q.2 : d | Q.3 : d | Q.4 : c | Q.5 : a | Q.6 : a | Q.7 : c | Q.8 : a | Q.9 : b | Q.10 : a