#### 10th Public Exam March 2019 Creative 5 Marks Questions

10th Standard

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Science

Time : 02:30:00 Hrs
Total Marks : 80
80 x 5 = 400
1. Genetic engineering resulted to a new Branch of science.
(a) Define genetic engineering.
(b) What are the benefits of genetic engineering?
(c) What are the uses of restriction endonucleases and DNA ligase?

2. a) What is bio sensor?
b) State any four applications of bio sensor.(or)
State any four applications of bio sensor in medicines.(or)
Mention its uses in medicine and Industry.

3. Explain about the uses of Biotechnology

4. Stem cell culture has brought a lot of benefits to mankind.
a) List the types of stem cells.
b) What are the characteristic features of stem cells?
c) How are the somatic stem cells obtained?

5. Give the microbial products of everyday use.

6. One of the most fascinating branches in applied embryology is stem cell culture
a. List the types of stem cells.
b. What are the characteristics features of stem cells?
c. How are the somatic stem cells obtained?

7. What are the scope of Bio-Technology?

8. a) What is cloning?
b) Explain the development of Dolly by cloning.
c) What are the types of cloning?

9. a) What is Bio - sensor? Mention its uses.
b) What is Bio - chips? Mention its uses.

10. a) Mendel selected which plant for his experiments.
b) What are the visible contrasting characters observed by Mendel in that plant?
c) What do you know about phenotype and Genotype.

11. Write a detailed note on malaria disease.

12. A) What is immunization?
B) Give the immunization schedule followed in India

13. List out the diseases not caused by organisms (Non communicable) with the reasons.

14. Table showing disease caused by parasitic micro organism, its causative agent, Symptoms, Transmission, Control and Prevention.

15. Acquired Immune Deficiency Syndrome (AIDS)is a dreadful disease transmitted through sexual contact (or). through blood and blood products.
a) Name the virus which causes AIDS.
b) Who isolated the virus?
c) Mention the symptoms of AIDS.

16. Give the causative agent, symptoms, prevention and control for malaria

17. Mention the preventive measures for HIV.

18. Tuberculosis affects lungs and other parts of our body.
a) What is the causative agent of Tuberculosis? •
b) What are the symptoms of Tuberculosis?
c) How tuberculosis is transmitted?
d) How to prevent Tuberculosis?

19. List out the hormones of adenohypophysis with its functions and malfunctions.

List out the hormones of Neurohypophysis with its function and malfunction.

21. a) In human which is the central information processing organ?
b) What are the three parts of human brain?
c) Which part constitute nearly two third of the brain?
d) What are the components of cerebral cortex?
e) Give the location of mid brain and cerebellum.

22. a) Define fertilization?
b) What are the post-fertilization changes?
c) What are parthenocarpic fruits?

23. a) How does asexual reproduction takes place?
b) Explain different kinds of spores.

24. a) What is cross pollination?
b) Explain the agents of cross pollination with examples

25. a) The seeds fall off far away from the mother plant. Why?
b) Explain the dispersal mechanisms of fruits and seeds in plants

26. a. Draw and label the parts of nephron
b. Explain the structure of nephron

27. a) What are the components of blood?

28. Explain the types of blood cells.

29. How food is transported in plants?

30. a) What is meant by movement dependent on growth?
b) Explain the types of movement dependent growth.

31. a. What is global village?
b. What is the use of global village?
c. What are the technologies used in global villages?

32. a) What is Green Chemistry?
b) Mention the products produced by the process of green chemistry.Products of Green Chemistry

33. a)What are the principles of Green Chemistry?
b)What are the future products of green chemistry?

34. Give an note on important sanctuaries in Tamil Nadu (any five)

35. a) What is an Ecosystem?
b) Mention the types of Ecosystem.
c) Explain the major components in Ecosystem

36. Compare the Properties of True Solution, Colloidal Solution and Suspension.

37. a) What is solubility of a solute?
b) Explain the factors affecting the solubility.

38. a) What is a solution?
b) What are the types of the solution?

39. (a) List out the differences between atoms and molecules.

(b) Find the number of moles in copper containig 12.046 $\times$ 1023 molecules.

40. Modern atomic theory takes up the wave concept, principle of uncertainty and other latest discoveries to give a clear cut picture about an atom. State the findings of modern atomic theory.

41. How will you establish the relation between vapour density and molecular mass of a gas by applying Avogadro's law?

42. Calculate the number of moles in:
a. 12.046 ｘ1023 atoms of Copper
b.27.95g of Iron
c.1.51 ｘ1023  molecules of CO2

43. List out the applications of Avogadro's law.

44. a)Differentiate Isotopes and Isobars:

45. Give any 3 features of modern atomic theory.

46. What are the applications of Avogadro's law?

47. a) Differentiate oxidation and reduction.
b) Differentiate acids and bases.

48. Narrate the importance of pH in everyday life.

49. a) What is a salt?
b) Mention the classification of salts with an example.
c) Give the uses of salts.

50. Explain the classification of acids with an example.

51. a) What is an acid?
b) Mention the uses of acid.

52. Explain the chemical properties of acids.

53. Explain the characteristic of modern periodic table.

54. Explain the process of extraction of aluminium from bauxite

55. Explain the chemical properties of iron.

56. To Raise Questions
Common name and IUPAC name of organic compounds

57. A) Ethanoic acid reacts with ethanol in the presence of concentrated sulphuric acid.
1.Name the organic product formed?
2. Give the name of the reaction?
3. What is the role of sulphuric acid in the above reaction?
B) The structural formula of an organic compound ts CH3 - CH2- OH
1. Write the IUPAC name of this compound
2. Give one use of this compound

58. a) What is the functional group of alcohol
b) Write the esterification reaction.
c) Write uses of ethanol.

59. A) Name the enzymes used in the manufacture of ethanol from. molasses.
B) What happens when yeast is added to dilute molasses?
C) Write the evil effects of consuming alcohol.

60. Explain the chemical properties of Ethanoic acid.

61. a) What are saturated hydrocarbons or alkanes?
b) What is the general formula and suffix of alkanes?
c) Give some alkanes with formula, common name and IUPAC name

62. a) What are alkenes?
b) What is the general formula and suffix of alkenes?
c) Give some alkenes with formula, common name and IUPAC name

63. a) What are alkynes?
b) What is the general formula and suffix of alkynes?
c) Give some alkynes with formula, common name and IUP AC name.

64. a) What is a functional group?
b) Tabulate the classification of organic compounds bases on functional group.

65. Explain how ethanol is manufactured from molasses.

66. Explain the chemical properties of ethanol

67. a) What is the functional group of alcohol?
b) Write the esterification reaction
c) Write uses of ethanol.

68. What is astronomical unit and light year.

69. State and deduce the principle of conservation momentum.

70. What are the uses of Cryogenic techniques?

71. What are the applications of cryogens?

72. Explain Newton's second law of motion w!th an example.

73. The phenomenon of spontaneous emission of highly penetrating radiations such a$\alpha$,$\beta$ and $\gamma$  rays by heavy elements having atomic number greater than 82 is called radioactivity.
a) What are tile properties of these radiations?
b) Mention the precautions to be taken for those who are working in radiation laboratories.

74. What are the defects of, eye? How are these rectified?

75. Observe the figure and answer the following questions:

i) What does the given diagram represent?
ii) Write the principle of the device denoted in the given diagram.

76. While dealing with the reflection of light by spherical mirrors, we shall follow a set of sign convections called the New Cartesian sign convention. What are the conventions?

77. Explain defects of vision and its rectification.

78. a) Give the laws of reflection of light.
b) Give the laws of refraction of light.

79. a) What is an electric motor?
b) What is the principle used in an electric motor?
c) List the factors that enhance power of a commercial motor.

80. (a) Label the following in the given diagram of human eye.
1. Retina 2. Iris 3. Crystalline lens 4. Aqueous humour 5. Pupil 6. Ciliary muscles 7. Optic nerve. 8. Vitreous humour 9. Cornea
(b) Mention the reasons for the defects of vision, myopia and hypermetropia.