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
It is possible to measure the passage of 50 electrons per sec with a certain sensitive device. This corresponds to a current of:
Q.2
Fill in the blank:
Neutral water with pH of about 7 becomes slightly acidic when aerated. This is because ________________.
Q.3
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.4
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. Reason (R): In a group, the atomic radii generally increase from top to bottom.
Q.5
Which of the following statements is correct regarding the grafting process?
Q.6
In the following question, an assertion and a reason are given. Choose the correct option:
Assertion (A): In any food chain, the number of organisms in any trophic level should always be less than that in its previous trophic level. Reason (R): Only 10 percent of total energy present in a trophic level is transferred to the next trophic level in any food chain.
Q.7
Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance?
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
When a person walking in bright sunlight enters a dark room, he is not able to see clearly for a little while.
Identify the correct reason for the above statement:
Q.10
Choose the correct option and complete the following sentence:
An electric motor consists of ____________. I. rectangular coil of insulated copper wire II. two poles of a magnetic field III. split rings IV. conducting brushes
Your Score: 0/10
Answers to Sample Questions from CREST Olympiads:
Q.1
a
Q.2
d
Q.3
c
Q.4
d
Q.5
d
Q.6
a
Q.7
b
Q.8
c
Q.9
d
Q.10
c
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 : d | Q.5 : d | Q.6 : a | Q.7 : b | Q.8 : c | Q.9 : d | Q.10 : c
