Name of the Organization : Homi Bhabha Centre For Science Education
Name Of The Exam : Indian National Junior Science Olympiad 2017
Document Type : Sample Question Paper
Subject : Junior Science
Year : 2017

Website : http://olympiads.hbcse.tifr.res.in/?page_id=1376#QS
Download Model/Sample Question Papers : http://www.indianjobtalks.com/upload...JSOscience.pdf

Indian National Junior Science Olympiad Question Paper :
Duration: 3 Hours
Maximum marks: 90

Instructions :
** Please write your roll number on top of this page in the space provided.
** Please use only black or blue pen to write your answers in the Answer Sheet provided. Please do not use a pencil.
** Before starting, please ensure that you have received a copy of this Question paper containing a total of 20 pages (20 sides on 10 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. One additional page for answering those questions have also been appended, in case of necessity.

** A blank page have been provided in the Answer sheet, for rough work.
** Please write the answers in the answer sheet only.
** Calculator(s) and mobile phone(s) are not allowed.
** The Answer Sheet must be returned to the invigilator. You may take this Question paper with you.

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. In an old Sherlock Holmes movie, a criminal kept a 12.5 cm long knife (mass 1 kg), in a 15 cm thick book (excluding thickness of the covers) with a spring trap. The spring has 25 turns each of 1 mm thickness. The spring is fixed at the back cover and the knife presses the spring to its maximum when the front cover is closed so that the turns touch each other.
a) 160/9 N/mm
b) 40/9 N/mm
c) 40 N/mm
d) 6.4 N/mm

2. The focal length of a biconvex lens made of a soft material can be changed by changing its shape. An object was brought from far away to near the biconvex lens. For each option given below, the first (left side) graph gives dependence of 1/von 1/u as the shape of the lens is changed, and the second graph gives corresponding dependence of f on|u|. Here u, v and f have standard meanings and all images are real. Which of the following options is the correct representation of that lens?

3. A black dot has a mass of about one femto gram. Assuming that the dot is made up of carbon only, calculate the approximate number of carbon atoms present in the dot.
a) 1 × 108
b) 5 × 1010
c) 5× 107
d) 1× 1011

4. Among the following, the third ionisation energy is highest for which one of the following elements?
a) Boron
b) Magnesium
c) Aluminium
d) Beryllium

5. In a hypothetical situation, a cell was found to lack rough endoplasmic reticulum. Which one of the following activities was all likely absent in this cell?
a) Transcription
b) Translation
c) Synthesis of secretory proteins
d) Manufacture of fat molecules or lipids

6. In a laboratory, a plane mirror and a student move with velocities as shown in the figure. X and Y components of the velocity (in m/s) of the image (of the student), as seen by the student, are respectively
a) – 2.5(2+v3), Zero
b) - 5, (5v3 - 2.5)
c) - 5(2+v3), Zero
d) - 5(1+v3), Zero

7. In liver transplantation, the first three months after transplantation is when the patient requires the most care and post-surgery monitoring. Which of the following statement is most suitable up to three months for a patient who has undergone liver-transplantation recently?
a) She will require no drugs but only care and follow ups.
b) She will be treated with immunosuppressive drugs only.
c) She will be treated with antibiotics only.
d) She will be treated with combination of immunosuppressive drugs and antibiotics.

8. While driving on a level road at 72 kmph, Vinayak observes the traffic signal turning red, the (white) stopping line being 52 m away from the front end of his car. Immediately he applies the brakes that decelerate his car at 4 m/s2. How far from the stopping line will the front end of Vinayak's car be after 6 seconds?
a) Zero
b) 2 m
c) 4 m
d) 6 m

9. When a mixture of 60mL of carbon monoxide and 40mL of oxygen is sparked, mixture A is obtained. Mixture A is passed through aqueous potassium hydroxide to yield mixture B. The volumes of mixtures A and B respectively are
a) 70mL,10mL
b) 40mL,20mL
c) 60mL,20mL
d)80mL,10mL

10. A convex mirror of radius of curvature 12 cm has its principal axis horizontal. A simple pendulum with a tiny bob is oscillating in front of the mirror such that centre of mass of the bob is 12 cm away from the mirror along the principal axis. Amplitude of oscillation is 3 cm and there is practically no damping. Length of the pendulum is sufficiently large and the plane of oscillation is such that the bob moves practically along the principal axis of the mirror. Path length of the image of the bob formed by the mirror is …..
a) 4 cm
b) 2 cm
c) 0.7 cm
d) 8 cm

11. Choose the correct sequence of the following ions in increasing order of their ionic radii.
a) Be2+< Li1+< F1- < O2-
b) Li1+< Be2+< O2-<F1-
c) O2- < F1-< Li1+< Be2+
d) Li1+< Be2+ < F1- < O2-

12. A point source of light B is placed at a distance d, in front of the centre of a mirror of horizontal length L fixed on a wall. A man walks in front of the mirror and parallel to it at a distance 2d from it as shown in the figure. The greatest distance over which he can see the image of the light source in the mirror is
a) L/2
b) L
c) 2L
d) 3L

13. A group of biology students on excursion to Goa beaches collected the following animal samples.While they were putting the animals in the jar with sea water, they noticed that one of the animal’s 1/3rd body part was missing. The injured animal (with only 2/3rd of its body) was brought to the lab and was allowed to grow in the laboratory in appropriate condition. To their surprise the lost body part of the animal had regenerated. Which of the above animal would have been collected?
a) Planaria
b) Hermit crab
c) Sepia
d) Sea anemone

14. A buoy, of height 2 m, is floating in the sea. A wave of amplitude 0.5 m and wavelength ? >> base of the buoy, passes the buoy. The maximum tilt of the buoy (from the vertical) will practically
a) Depend on the amplitude only.
b) Depend on the frequency only.
c) Depend on both frequency and amplitude.
d) be 90°

15. A compound exists in the gaseous state both as monomer (A) and dimer (A2) .The molecular weight of the monomer is 48. In an experiment, 96 g of the compound was confined in a vessel of volume 33.6 litres and heated to 273°C. Calculate the pressure developed, if the compound exists as a dimer to the extent of 50% by weight under this condition, assuming that temperature does not affect the physical state of the dimer.
a) 0.67 atm
b)1 atm
c)1.33 atm
d)2 atm