jbnsts.org Model Questions for Junior Talent Search Test JTST : Jagadis Bose National Science

Organisation : Jagadis Bose National Science Talent Search
Exam : Junior Talent Search Test – JTST
Document Type : Model Question Papers

Website : http://jbnsts.org/
Download Model Question Paper for JTST :  https://www.pdfquestion.in/uploads/9260-JTST.pdf

JBNSTS Junior Talent Search Test Model Questions

Through the work experience of more than five decades, JBNSTS realized that it would be more effective if we catch the students when they are very young.

Thus JBNSTS took the initiative to start a Junior Talent Search Test from 2015 for class XI Science students of West Bengal.

Related / Similar Question Paper :
JBNSTS Sample Question Paper

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1. Three filament bulbs A, B and C are connected with a cell as shown in figure
1. The bulb B is not glowing while A is glowing brighter than C.
What conclusion can you draw about the filaments of the bulbs A, B and C? Justify your answer.
Now the bulbs are connected as shown in figure 2. How will the bulbs A, B and C glow now? Justify your answer.

2. In the diagram below
A = Small piece of stone
B = An iron weight
C = Uniform ruler (50 cm, calibrated)
D = Beaker full of water.
With given materials and set up do a suitable thought experiment and find out the ratio of the weight of piece of stone and the weight of its equal volume of water by the measurement of length only. Expression of the ratio will contain only measured lengths from the ruler.

3. (i) During hydrogenation of vegetable oil to produce solid fats, unsaturated plant oils are treated with hydrogen in presence of a solid catalyst. Unsaturated oil h/n saturated fat
(ii) Nickel can be used in the form of thin wire or finely divided powder. In which case will the reaction be faster, with the catalyst in thin wire or finely divided powder form? Justify.
(iii) Can you put forward a quantitative model in support of your answer? Start with a Ni cube of side 1cm and proceed.

4. Suppose, in expense of 9.65 amperes of electricity you need to deposit a layer of metal coating uniformly on a plate ‘A’ of weight 5 g. You are allowed to choose any 3 metals from d-block of the periodic table (atomic numbers between 21 to 30, where atomic wt. may be considered as double of the atomic number of the respective metals). In order to coat, you are asked to perform the experiment uniformly for 15 minutes for all the chosen metals separately and plate A.

(i) Now write the metal compounds you are going to choose and then calculate and show the increasing order of weight of your coated plates used in your experiments.
(ii) Could you suggest a law based on which you could perform your work?

5. Show that the equation x4 – x3 + x2 – x + 1 = 0 does not have any real solution.
6. Solve for 0 and sec0 of the equation = 4x – x2 – 3 , where = 90.

7. Suppose a line segment is divided into two parts so that the area of the rectangle R formed by the entire line and one of the parts is equal to the area of the square S1 drawn on the other part. Consider the square S2 drawn on one of the diagonals of R. Show that the area of S2 is equal to three times the area of S1.

8. a) Write one morphological adaptation of a plant to warm wet climate.
b) How can a desert camel survive without drinking water or eating succulent food?
c) Plants of cold climates resemble those of deserts in that they are adapted to reduce transpiration during the dry season, which is winter in a cold climate. How the leaves do adapt in such climate?

9. a) Two pots marked A and B are partially filled with soil. Now you are asked to fill the pot A with plant waste & the pot B with some waste materials like plastic bags, glass bottle broken plastic toys etc. They are allowed to remain in an identical atmosphere for few days. Do you expect to observe any difference in the resulting soils of the pot A and Pot B? Explain.

b) How does the over doses of fertilizer causes harmful effect on nitrogen cycle?
c) What are the ways through which the pathogenic microbes enter into human bodies? What will be the harmful effect of hypo and hyper doses of antibiotic application?

10. State whether the following statements ate true or false. If false, correct the statement:
a) Ribosomes are made up of DNA and Lipid
b) The function of Meiosis II is to separate chromosome.
c) In plant cell the centriole is the centre of formation of Spindle fibre.
d) The longest phase of Mitotic cell division is anaphase
e) G1 is called pre mitotic phase.

11. i. A boy is suffering from hyperacidity. Should he avoid protein rich foods? Explain.
ii. A middle aged woman has been recently diagnosed with diabetes mellitus. Should she eat/drink more bitter substances (such as: neem, karalla, kalmegh, chirata, etc.) in order to cure this? Explain.

Scholarship Test

It is a bi-phasic test involving written test (1st Phase) and Interview (Final Phase).
On the basis of the performance of written test, short listed candidates are selected for interview.
Finally, on the basis of the performance of both written test and interview, a list of Junior scholars is announced.

Who Can Apply For The Test ?

The students who have passed their 10th standard or equivalent examinations with 75% marks in aggregate and taken admission in class XI in science stream (with atleast 3 subjects from Physics, Chemistry, Mathematics, Biology, Statistics and Computer Science) in the year of application.