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 |
Identify the correct sequence of fractions obtained when petroleum is subjected to fractional distillation: (1) Lubricating oil |
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Q.2 |
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.3 |
Choose the correct option and complete the following sentence: An electric motor consists of ____________. |
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Q.4 |
Consider the following reaction: 2CaO + C → CaC2 + 2CO If X is involved in the neutralization reaction with acid, then Y may be: |
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Q.5 |
Length and diameters of four wires of same material are given below. The resistance of which of the following wires will be minimum? |
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Q.6 |
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 ____________. |
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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: |
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Q.8 |
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.9 |
Which of the following is obtained in its pure form by the reaction of sugar and sulphuric acid? |
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Q.10 |
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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Answers to Sample Questions from CREST Olympiads:
Q.1 : c | Q.2 : b | Q.3 : c | Q.4 : b | Q.5 : c | Q.6 : c | Q.7 : a | Q.8 : b | Q.9 : b | Q.10 : a