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Name of the Centre : Homi Bhabha Centre For Science Education
Name Of The Exam : Indian National Junior Science Olympiad – INJSO 2016
Name Of The Subject : Junior Science
Document type : Sample questions Papers
Year : 2017

Website :
Download Model/Sample Question Paper :
INJSO 2016 :
INJSO 2015
INJSO 2014
INJSO 2013 :

HBCSE Indian National Junior Science Olympiad

Duration: 3 Hours
Maximum marks: 90

Related : Homi Bhabha Centre For Science Education Indian National Chemistry Olympiad INChO 2016 :

Instructions for students

** Please write your roll number on top of this page in the space provided.

** Before starting, please ensure that you have received a copy of this Question paper containing a total of 22 pages (22 sides on 11 sheets including the first 2 cover pages for instructions and values of physical constants).

** In section A, there are 30 multiple choice questions with 4 alternatives, out of which only 1 is correct. You get 1 mark for every correct answer and – 0.25 mark for every wrong answer.
** In Section B there are 12 questions of total 60 marks.

** For each of the 12 questions in Section B, a separate page has been provided in the Answer sheet, with the particular question number indicated in the top left hand corner. Two additional pages for answering those questions have also been appended, in case of necessity.

** Blank spaces have been provided in the Answer sheet, for rough work. Please write the answers in the answer sheet only.
** Calculator and mobile phone is not allowed.
** The Answer Sheet must be returned to the invigilator. You may take this Question paper with you.

Model Questions

Section A :
Questions 1 to 30 are Multiple Choice questions with every correct answer carrying 1 mark and every wrong answer carrying – 0.25 mark. :
1. Ingestion, digestion, absorption, assimilation and egestion are the steps in food processing in our body. Majority of absorption takes place in small intestine (villi) and which is transported to different organs through the circulatory system. Starting with villi, which of the following is the correct sequence of organs that the absorbed food passes through?
a) Liver -> Other organs -> Heart
b) Heart -> Liver -> Other organs
c) Heart -> Other organs -> Liver
d) Liver -> Heart -> Other organs

2. There is a regular bus service between Pune and Mumbai (180 km apart) at every hour from both the cities. First bus leaves (Both Mumbai as well as Pune) at 4 am while the last leaves at 11 pm. These busses run at an average speed of 45 km/hr. Taxies also run on the same route at 60 km/hr with regular interval of 30 min. First taxi leaves (Both Mumbai as well as Pune) at 4 am while the last leaves at 10 pm. Following statements are based upon the number of taxies or buses crossed (not overtaken) only during travelling i.e. excluding instances of arrival and departure. Consider following statements.
(1) Taxi left at 8 pm crosses 10 taxis.
(2) Last taxi crosses 5 buses.
(3) Last bus crosses 4 taxies.
a) Statements 1 & 2 are only correct.
b) Statements 2 & 3 are only correct.
c) Statements 1 & 3 are only correct.
d) All the statements are correct

3. Arun is electrolyzing a mildly acidic aqueous solution containing a mixture of CuCl2 and ZnSO4 using Pt electrodes. The products obtained at the cathode and anode respectively are
a) H2 and Cl2
b) Cu and Cl2
c) Zn and O2
d) H2 and O2

4. Vector is the resultant of vectors and . Select correct statement about their magnitudes.
a) C may be equal to A
b) C > A and C > B
c) C = A + B
d) C cannot be less than the smallest among A and B.

5. A colourless solution of compound ‘A’ gives white precipitate, ‘B’, when treated with sodium hydroxide solution. The white precipitate dissolves in excess of sodium hydroxide solution. The clear solution thus obtained when treated with hydrogen sulphide gas gives white precipitate (C) Identify A,B, and C .
a) MgSO4, Mg(OH)2 ,MgS
b) Al2(SO4)3, Al(OH)3 , Al2S3
c) ZnSO4, Zn(OH)2 ,ZnS
d) (NH4)2SO4, NH4OH, (NH4)2S

6. To overcome the problem of water shortage, most urban cities in India promote the concept of ‘rainwater harvesting’. Although the harvested water can be used variously, the main purpose of water harvesting is to:
a) directly collect water for household purposes.
b) use surface water for irrigation.
c) recharge ground water.
d) refill lakes and other water bodies.

7. INSAT series of satellites are launched by India for telecommunication. Such satellites appear stationary at a particular point in the sky when observed from the earth. Consider the following statements:
I. The path of these satellites is always bending towards the earth
II. These satellites do not need any fuel for its motion.
III. These satellites do not experience net force.
IV. Such satellites have to be positioned vertically above the equator.
a) Only II, III & IV are correct.
b) Only I, II & IV are correct.
c) Only I & III are correct.
d) Only I & II are correct.

8. In case of mammals the volume of air inhaled and exhaled with each breath during normal breathing is called as tidal volume. The inhaled air at a time is not completely exhaled because the inlet and outlet for air is the same. The air that remains in the lungs after a forced exhalation is called a residual volume. As each inhalation mixes fresh air with oxygen depleted residual air the partial pressure of oxygen (PO2) is different from that of the atmosphere. The following statements were made with reference to the above information.

A. PO2 in alveoli is higher than that of the atmosphere.
B. PO2 in alveoli is lower than that of the atmosphere.
C. An animal, e.g. bird, in which there is unidirectional flow of air into lungs (i.e. inhaled and exhaled air did not use the same pipe) the maximum PO2 in their lungs will be higher than that of mammals.

D. An animal, e.g. bird in which there is unidirectional flow of air into lungs (i.e. inhaled and exhaled air did not use the same pipe) the maximum PO2 in their lungs will be lower than that of mammals.

E. Birds will have less breathing problems at higher altitude than mammals.
F. Birds will have more breathing problems at higher altitude than mammals.
Which one is the most correct combination of the above statements?
a) A, C, E
b) B, C, E
c) A, D, F
d) B, C, F

9. Imagine a conductor in a cylindrical shape of radius R. Two thin circular discs of radius R made up of non-conducting material, carrying charge + Q and – Q respectively, are attached to the two ends of this cylinder. Consider following statements.
I. Free or conduction electrons in the conducting cylinder will drift towards +Q.
II. A constant current will be set up through cylinder.
III. Constant current will flow for very short duration of time.
a) Only I is true.
b) Only II is true.
c) Only III is true.
d) Only I and III are true.

10. Focal length of a concave mirror is f. In terms of f, the separation between an object and its doubly magnified real image by this mirror is –
a) 9f/2
b) 5f/2
c) 4f
d) 3f/2

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