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
I. Ohm's law is not applicable at very low and very high temperature. II. Ohm's law is applicable to the semiconductor. III. Ohm's law is not applicable to electron tubes, discharge tubes and electrolytes. IV. If a 24-volt battery is connected to a 6-ohm resistor, the current passing through the resistor is 4 A.
Q.2
Identify the correct sequence of fractions obtained when petroleum is subjected to fractional distillation:
Lubricating oil
Petrol
Petroleum ether
Diesel oil
Q.3
Fill in the blank:
Neutral water with pH of about 7 becomes slightly acidic when aerated. This is because ________________.
Q.4
What volume of hydrogen gas at 273 K and 1 atm pressure will be consumed in obtaining 21.6 g of boron (At. mass: 10.8) from the reduction of BCl3 by hydrogen?
Q.5
Which of the following equations is not an example of displacement reaction?
Q.6
It is possible to measure the passage of 50 electrons per sec with a certain sensitive device. This corresponds to a current of:
Q.7
Olivia measured the focal length of a convex lens by focusing a parallel beam of yellow, violet and green colours at the principal axis. If fy, fv and fg are the respective focal lengths, then which among the following is the correct relation?
Q.8
Which of the following statements is correct regarding the grafting process?
Q.9
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.10
Consider the following reaction:
2CaO + C → CaC2 + 2CO 2CaC2 + 2H2O → X + Y
If X is involved in the neutralisation reaction with acid, then Y may be:
Answers to Previous Year Questions from CREST Olympiads:
Q.1
c
Q.2
c
Q.3
d
Q.4
c
Q.5
b
Q.6
a
Q.7
b
Q.8
d
Q.9
b
Q.10
b
Students can find the most recent CREST Science Olympiad previous year paper pdf for class 10 on this page. The pdf is easily downloadable & answer key for all the questions is also provided on the last page.
CREST Science Olympiad previous year papers become quite useful while preparing for the CREST Science Olympiad exam. Below are some advantages of referring to the previous year papers -
Students get to understand the types of questions that come in the CREST Science Olympiad exam.
Practicing previous years’ papers help students to get to know their strengths and weaknesses.
Students become capable of effectively managing their time in the exam by practicing previous years' papers multiple times.
Additional Preparation Resources
Students can also refer to the following resources to level up their CREST Science Olympiad (CSO) exam preparation for class 10 -
CREST Science Worksheets Package for class 10 - It is a package of 5 worksheets. The worksheets are in the same pattern as the previous year paper. Hence, very useful for preparation. Existing users can purchase additional practice worksheets by following these steps: Login at https://www.crestolympiads.com/login -> Dashboard -> Additional Practice -> Buy & new users can visit https://www.crestolympiads.com/registration
CREST Science Olympiad book for class 10 - The book covers topic-wise reading material, chapter-wise practice questions with answer key & contains the previous year paper. The book is available in both physical and pdf formats. Proceed now to purchase the Olympiad book. Also, students can view & download the first chapter of the Science Olympiad book for class 10 for free.
Note: Don’t forget to download the CREST Science Olympiad past year paper pdf for class 10.
Answers to Previous Year Questions from CREST Olympiads:
Q.1 : c | Q.2 : c | Q.3 : d | Q.4 : c | Q.5 : b | Q.6 : a | Q.7 : b | Q.8 : d | Q.9 : b | Q.10 : b
