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
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?
Q.2
Which of the following metals cannot be refined by electrolytic refining?
(i) Au (ii) Cu (iii) Na (iv) K
Q.3
Which environmental hazard is not contributed by the combustion of fossil fuels?
Q.4
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.
Q.5
Arrange the following in the increasing order of ease of oxidation:
(A) SO4-2 (B) F-1 (C) Br-1 (D) OH-
Q.6
Which of the following statements about carbon is/are correct?
A. It has a small atomic size. B. Its melting and boiling point is low as compared to other members of the group. C. It shows the electropositive character. D. It shows the maximum tendency of catenation.
Q.7
An air bubble in a glass slab (μ = 3/2) is 6 cm deep when viewed from one face and 3 cm deep when viewed from the opposite face. Determine the thickness of the slab:
Q.8
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 ____________.
Q.9
Match List I (Vegetative propagation type) with List II (Example):
Column I (Vegetative propagation type)
Column II (Example)
1.
Tuber eye
a.
Garlic
2.
Bulb
b.
Rose
3.
Cutting
c.
Potato
4.
Plantlets at margins of leaves
d.
Bryophyllum
Q.10
Which of the following statements is correct regarding the grafting process?
Your Score: 0/10
Answers to Sample Questions from CREST Olympiads:
Q.1
a
Q.2
d
Q.3
c
Q.4
b
Q.5
d
Q.6
d
Q.7
b
Q.8
c
Q.9
b
Q.10
d
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 : d | Q.3 : c | Q.4 : b | Q.5 : d | Q.6 : d | Q.7 : b | Q.8 : c | Q.9 : b | Q.10 : d
