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
Neutral water with pH of about 7 becomes slightly acidic when aerated. This is because ________________.
Q.2
Choose the correct option and complete the following sentence:
Sexual reproduction causes genetic variation because of _____________.
blending of genes
chromosomal changes
shuffling of genes
Q.3
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.
Q.4
Identify the correct sequence of fractions obtained when petroleum is subjected to fractional distillation:
Lubricating oil
Petrol
Petroleum ether
Diesel oil
Q.5
The formation of the ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?
Q.6
In the following question, an assertion and a reason are given. Choose the correct option:
Assertion: The magnetic field produced by a current-carrying solenoid is independent of its length and cross-section area.
Reason: The magnetic field inside the solenoid is uniform.
Q.7
Study the circuit given below and determine the effective resistance (in Ω) between A and B:
Q.8
A convex mirror of focal length f produces an image 1/nth of the size of the object. Calculate the distance of the object from the mirror:
Q.9
Which of the following metals cannot be refined by electrolytic refining?
(i) Au (ii) Cu (iii) Na (iv) K
Q.10
Which of the following is obtained in its pure form by the reaction of sugar and sulphuric acid?
Your Score: 0/10
Answers to Sample Questions from CREST Olympiads:
Q.1
d
Q.2
d
Q.3
a
Q.4
c
Q.5
b
Q.6
b
Q.7
a
Q.8
c
Q.9
d
Q.10
b
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 : d | Q.2 : d | Q.3 : a | Q.4 : c | Q.5 : b | Q.6 : b | Q.7 : a | Q.8 : c | Q.9 : d | Q.10 : b
