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TNSCERT SSLC Science Model Question Paper 2019 – 2020 : Educational Research & Training Tamilnadu

Organisation : State Council of Educational Research and Training Tamilnadu
Exam : Secondary Second Year – SSLC
Document Type : X Standard – Model Question Paper Download
Category or Subject : Science
Website : http://www.tnscert.org/tnscert/index.php?language=LG-1&status=Active

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TNSCERT X Science Model Question Paper

Download TNSCERT X Standard SSLC Science Model Question Paper 2019 – 2020 from the official website of State Council of Educational Research and Training Tamilnadu.

Related : TNSCERT Educational Research and Training Tamilnadu Social Science Question Paper 2019 – 2020 : www.pdfquestion.in/34138.html

Science

Time Allowed : 15min + 21/2 hrs
Maximum Marks : 100
Instruction :
(1) Check the question paper for fairness of printing. If there is any lack of fairness, inform the Hall Supervisor immediately.
(2) Use Blue or Black ink to write and underline and pencil to draw diagrams.

English & Tamil Version
Time Allowed : 15 mins + 2 12 hrs
Maximum Marks : 75

Instructions :
1. Check the question paper for fairness of printing. If there is any lack of fairness, inform the Hall supervisor immediately.
2. Use Blue (or) Black ink to write and underline and pencil to draw diagrams.
3. This question paper contains four Parts

Download Question Paper :
https://www.pdfquestion.in/uploads/pdf2019/34145-SCI.pdf

Part I

Answer all the questions.
i) Choose the most suitable answer and write the code with the corresponding answer.
1. To project the rockets which of the following principles is / are required?
a) Newton’s third law of motion
b) Newton’s law of gravitation
c) Law of conservation of linear momentum
d) Both a and c

2. Kilowatt hour is the unit of
a) resistivity
b) conductivity
c) electrical energy
d) electrical power

3. element emits its radiation spontaneously
a) Ni
b) Pd
C) Pt
d) U

4. Which of the following is a triatomic molecule?
a) Glucose
b) Helium
c) Carbon dioxide
d) Hydrogen

5. is an important metal to form amalgam
a) Ag
b) Hg
c) Mg
d) AI

6. The component present in lesser amount, in a solution is called
a) Solute
b) solvent
c) Solution
d) Colloid

7. A patient with blood group ‘O’ was injured in an accident and has blood loss. In this condition the doctor should effectively use_ blood group for transfusion.
a) ‘O’ group
b) ‘AB’ group
c) ‘A’ or ‘B’ group
d) All blood group

8. Excessive consumption of alcohol leads to
a) Loss of memory
b) Cirrhosis of liver
c) state of hallucination
d) Suppression of brain function

9. is formed during anaerobic respiration
a) Carbohydrate
b) Ethyl alcohol
c) Acetyl CoA
d) Pyruvate

10. Casparian strips are present in the of the root.
a) Cortex
b) Pith
c) Pericycle
d) Endodermis

11. The soft finely stratified sedimentary rock refers to
a) shale
b) petroleum
c) methane
d) coal

12. All files are stored in the
a) Folder
b) box
c) paint
d) scanner

Part – II

Note :-
Answer any seven questions (Q.No : 22 is compulsory) (7×2 =14)
13. State Newton’s second law
14.What are the causes of ‘Myopia’?
15. What is the minimum distance needed for an echo?
16.Why does the rate of a reaction increase while raising the temperature?
17. Differentiate soaps and detergents
18. Write the dental formula of rabbit
19. What is Bolting? How can it be induced artificially?
20. Identify the parts A,B,C,& D
21.How can you determine the age of fossils?
22. A charge of 10 coulomb flows through a bulb in 5 second. What is the current through the bulb?

Part – III

Note :
Answer any seven questions (Q.No : 32 is compulsory) (7×4 =28)
23. State and prove the law of conservation of linear momentum ILLI
24.i) Draw a ray diagram to show the image formed by a convex lens when the object is placed between F and 2F.
ii) Define one calorie.

25.i) How many electrons are passing per second in a circuit in which there is a current of 5A?
ii) Mention two cases in which there is no Doppler effect in sound:
26. Derive the relationship between relative molecular mass and vapour density.
27. How is metal corrosion prevented?
28. With a neat labelled diagram explain the structure of a neuron.
29. a) Read the following content and answer the questions below. Pure – bred tall Pea plants are first crossed with pure – bred dwarf pea plants. The pea plants obtained in F1 generation are then cross – bred to produce F2 generation of pea plant.
i) What do the plants of F1 generation look like?
ii) What is the ratio of tall plants to dwarf plants in F2 generation?
iii) Which type of plants were missing in F1 generation but reappeared in F2 generation?
b) Why is the sino – atrial node called the pacemaker of heart?

30. Differentiate the following
i) Monocot root and Dicot root
ii) Aerobic and Anaerobic respiration.
31. (1) What precautions can be taken for preventing heart disease?
(ii) Name two maize hybrids rich in amino acid lysine.
32.(i) Write the features of Nuclear fission and Nuclear fusion.
(ii) Calculate the pH of 0.01M HNO3?

Part – IV

Note :-
1. Answer all the questions.
2. Each question carries seven marks.
3. Draw diagram wherever necessary.

33. (a) (i) State Boyle’s law
(ii) Explain the experiment of measuring the real and apparent expansion of a liquid with a neat diagram. 1
(b) (i) A source of sound is moving with a velocity of 50ms-1 towards a stationary listener. The listener measures the frequency of the source as 1000Hz. What will be the apparent frequency of the source when it is moving away from the listener after crossing him? (Velocity of sound in the medium is 330 ms-1)
(ii) Calculate the velocity of a moving body of mass 5kg whose linear momentum is 2kg ms-1.

34. (a) i) Calculate the mass of 1.51×1023 molecule of H2O.
ii) Calculate the moles of 46g sodium
iii) Calculate the number of molecules present in the 36g water.

b) Write notes on various factors affecting solubility thyroid hormones referred as personality hormones?
ii) Define triple fusion
iii) Enumerate the importance of forest.

(OR)
b) i) List out any three parasitic adaptations of leech
ii) Natural selection is a driving force for evolution. How?

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