IJSO International Junior Science Olympiad MCQ Sample Question Paper 2017 : ijsoweb.org

Organisation : International Junior Science Olympiad
Exam : International Junior Science Olympiad
Document Type : Sample Question Paper
Year : 2017
Category or Subject : Science
Website :http://www.ijsoweb.org/downloads
Download Question Paper : https://www.pdfquestion.in/uploads/23039-MCQ.pdf

International Junior Science Olympiad MCQ Paper

** International Junior Science Olympiad (IJSO) is a competition in science for students who are fifteen years or younger on 31 st December of the competition year.

Related : International Junior Science Olympiad Theoretical Sample Question Paper : www.pdfquestion.in/9331.html

** IJSO aims to promote interest in science among school students, exposing them to problem solving, critical thinking and experimentation. Over the years IJSO aims to positively impact science and mathematics education at school level.

IJSO Syllabus

** The syllabus of the International Junior Science Olympiad (IJSO) lists the skills and areas of knowledge the participants should be familiar with for this competition.

** It thus serves as a guideline for developing tasks to the Scientific Committees of the hosting countries but should also help the leaders of the participating countries to effectively train their students for this competition.

** In order to keep the syllabus up to date it should be revalidated every three years and if necessary shortened or expanded.

IJSO 2016 Question Papers

MCQ :
1. Chalk is composed of calcium carbonate, CaCO3. This water-insoluble compound is formed when a solution of calcium chloride is added to a solution of sodium carbonate. How many milliliters of 0.25 M calcium chloride are needed to react completely with 50 mL of 0.15 M Na2CO3 solution?
A. 10
B. 15
C. 30
D. 60

2. Zeolite as a porous material is often used as catalyst. Which of the following statements are CORRECT concerning catalyst.
(1) Catalyst increases the equilibrium constant of the reaction.
(2) Catalyst decreases the activation energy of the reaction.
(3) Catalyst is not involved in the reaction.
(4) Catalyst increases the rate of reaction.
A. (1) and (2)
B. (2) and (4)
C. (3) and (4)
D. (1) and (4)

3. An electron moves up from K (n=1) shell to M (n=3) shell. The correct statement concerning the phenomenon is …
A. electron absorbs energy equal to shell energy M minus shell energy K
B. electron absorbs energy equal to shell energy K minus shell energy M
C. electron emits energy equal to shell energy M minus shell energy K
D. electron emits energy equal to shell energy K minus shell energy M

4. Bioethanol (C2H5OH) can be used as alternative fuel in accordance with the following combustion reaction:
C2H5OH + 3O2 ? 2CO2 + 3H2O + Energy
If 13.8 g bioethanol is burnt with 19.2 g O2, the volume of CO2 gas emitted to the air when it
is measured at standard condition (STP) is … (Ar C=12, O=16, H=1)
A. 8.96 L
B. 13.4 L
C. 17.9 L
D. 6.72 L

5. An indicator, HIn has an ionization constant, Ka = 1 x 10-5. If the aqueous solution containing non-dissociated molecular form (HIn) of the indicator has yellow color and the solution of Inion is green, what would be the color of the solution of this indicator when its pH is 3.0?
A. yellow
B. green
C. pale yellow
D. pale green

6. Arrange in order of increasing energy for removing an electron from 19K+, 18Ar and 17Cl-
A. K+ < Ar < Cl-
B. Ar < Cl- < K+
C. Cl- < K+ < Ar
D. Cl- < Ar < K+

7. A 0.244 g sample of a diprotic acid requires 40.0 mL of 0.100 M of KOH for complete neutralization. The molecular mass of the acid is …
A. 244 g/mol
B. 122 g/mol
C. 61 g/mol
D. 488 g/mol

8. A very effective anesthetic, cyclopropane, contains the elements carbon and hydrogen combined in a ratio of 1.0 g of hydrogen and 6.0 g of carbon. If a given sample of cyclopropane was found to contain 30.0 g of hydrogen, how many grams of carbon would it contain?
A. 5
B. 54
C. 180
D. 864

9. One of the major environmental concerns is the phenomenon of acid rain. Rain water in an unpolluted atmosphere will be …
A. neutral
B. slightly basic
C. slightly acidic
D. strongly acidic

10. The pH of the solution of 5?10-8 M HCl at 25?C is ….
A. 6.3
B. 6.9
C. 7.3
D. 7.9

11. During an earthquake, a heavy object can sink into the ground if the shaking causes the ground to undergo liquefaction and the soil grains experience little friction as they slide over one another. The possibility of liquefaction in sandy ground can be predicted in terms of the void ratio e for a sample of the ground given by Here, grains V is the total volume of the sand grains in the sample and voids V is the total volume between the grains (in the voids). If e exceeds a critical value of 0.650, liquefaction can occur during an earthquake. If the primary component of the sand mainly originates from solid silicon dioxide (SiO2) with a density 2 2.60 103 SiO ? ? ? kg/m3, what is the corresponding sand density, ?sand, at the critical point?
A. 1.58?103 kg/m3
B. 1.69 ?103 kg/m3
C. 2.43?103 kg/m3
D. 4.00 ?103 kg/m3

12. Indonesia is one of the countries in Asia that is located on the equator. Suppose you were lying on a beach close to the equator watching the sunset over a calm ocean. You start a stopwatch just after the top of the Sun disappears and immediately stand up, elevating your eyes to aheight H = 1.70 m, and stop the stopwatch when the top of the Sun disappears again. If the elapsed time is ?t = 11.1 s and by assuming that the shape of the Earth is round, estimate the radius r of Earth based on your observation?
A. 4.83 ?106 m
B. 5.30 ?106 m
C. 6.61?106 m
D. 7.20 ?106m