Name of the Organization : Samacheerkalvi Tamil Nadu
Name Of The Exam : 10th Science
Document type : Model Question Paper
Website : samacheerkalvi.in
Download Sample/Model Question Papers :https://www.pdfquestion.in/uploads/5143-Science.pdf
Science Model Question Paper :
Time Allowed : 2.30 Hours
Maximum Marks : 75
Related : Samacheerkalvi Tamil Nadu English Model Question Paper : www.pdfquestion.in/5140.html
INSTRUCTION :
Check the question paper for fairness of printing. If there is any lack of fairness, inform the Hall Supervisor immediately. This question paper contains THREE SECTIONS.
SECTION – I :
Note :
(i) Answer all the 15 questions.
(ii) Choose the correct answer from the four alternatives given in the brackets. 15 × 1 = 15
1. Theory of natural selection was proposed by (Charles Darwin, Hugo de Vries, Gregor Johann Mendel, Jean Baptise Lamarck)
2. The first vaccine injected into a just born baby is __________ . (Oral polio, D.P.T., D.P.T. and oral polio, BCG)
3. In sexual reproduction of flowering plants the first event involved in this is (fertilization, germination, regeneration, polination)
4. The xylem in the plants are responsible for (transport of water, transport of food, transport of amino acids, transport of oxygen)
5. ____________ green house gas which causes climate change and global warming. (hydrogen, oxygen, nitrogen, carbon di oxide)
6. The particles in various forms are visible only under ultramicroscope. A solution containing such particles is called ________ . (True solution, collaidal solution, suspension, water
7. pH = − log10(H+). The pH of a solution containing hydrogen ion, concentration of 0.001m solution is __________(1, 3, 11, 14)
8. Gold does not occur in the combined form. It does not react with air (or) water. It is in ________. (native state, combined state, mixed state, gaseous state)
9. Second group elements are called __________ . (alkali, alkaline earth metals, transition elements, minor transition elements)
10. IUPAC name of first member of alkyne is ___________ . (ethene, ethyne, ethane, acetylene)
11. The weight of 50 kg person at the surface of earth is __________ . (50N, 35N, 380N, 490N))
12. The potential difference required to pass a current 0.2A in a wire of resistance 20 ohm is _________ . (100V, 4V, 0.01V, 40V)
13. The SI units of electric power is _________ . (Joule, volt, watt, coulomb)
14. An electric current through a metalic conductor produces __________ around it. (heat, light, magnetic field, mechanical force)
15. The Hubble space telescope design with two __________ is known for good imaging performance over a wide field of view. (plane mirrors, hyperbolic mirrors, concave mirrors, convex mirrors)
Section − II :
16. Match the following : Diseases with simptoms
(a) Nyctalopia − Profuse loss of blood
(b) Pernicious anemia − Bleeding gums
(c) Scurvy − Night blindness
(d) Haemorrhage − Destruction of RBC
17. Identical twins are syngenic with similar chromosomal contents. Natural clones are those who possess identical chromosomes. Fill up with suitable word given in brackets.
(i) Identical twins are _____________ (natural clone, induced clones)
(ii) Identical twins are ____________(dissimilar to each other, similar to each other)
18. Human brain and the functions of different parts are given above. Mark the diagram (a) and (b)
(a) seat ofsmell (b) seat of vision
19. Correct the statement if they are wrong.
(a) Alpha cells produce insulin and beta cells produce glucogon
(b) Cortisone supress the immune reponse
(c) Thymus gland is a lymphoid mass
(d) Ovary produces eggs and androgen
20. Based on relationship fill in the blanks :
Thyroxine____________ personality harmone.
Adrenalin ____________
21. Draw the diagram and label the parts.
22. Write the three important parts of uriniferons tubules
23. Observe the diagram
(a) Mention the type of movements shown in Fig A and B.
(b) How does the movement differ from the movement of mimosa
24. A non renewable resource is a natural resource. If it is replaced by natural process at a rate comparable or faster than its rate of consumption by humans. Read this statement and confirm whether it is correct or incorrect. If it is incorrect give correct statement.
25. Describe : Energy conservation.
26. What are the bio fuels for transportation?
27. Find the concentration of solution in terms of weight percent if 20 gram of common salt is dissolved in 50 gram of water.