Revision Test

9th Standard

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Science

Time : 02:00:00 Hrs
Total Marks : 100

    Section-A

    15 x 1 = 15
  1. Density is_________

    (a)

    \(\frac{volume}{mass}\)

    (b)

    \(\frac{mass}{volume}\)

    (c)

    \(\frac{area}{volume}\)

    (d)

    \(\frac{volume}{area}\)

  2. 1 quintal is equal to_______kg.

    (a)

    100

    (b)

    200

    (c)

    1000

    (d)

    10

  3. A body moving with an initial velocity 5ms-1 and accelerates at 2ms-2. Its velocity after 10s is

    (a)

    20ms-1

    (b)

    25ms-1

    (c)

    5ms-1

    (d)

    22.55ms-1

  4. Choose correct statement
    (a) Action and reaction forces act on same object
    (b) Action and reaction forces act on different objects
    Both (a) and (b) are possible
    Neither (a) nor (b) is correct

    (a)

    Action and reaction forces act on same object

    (b)

    Action and reaction forces act on different objects

    (c)

    Both (a) and (b) are possible

    (d)

    Neither (a) nor (b) is correct

  5. The focal length of a concave mirror is 5cm. Its radius of curvature is

    (a)

    5 cm

    (b)

    10 cm

    (c)

    2.5 cm

  6. When a beam of white light passes through a prism it gets

    (a)

    Reflected

    (b)

    deviated and dispersed

    (c)

    only deviated

  7. Difference in ________________is the principle used in fractional distillation

    (a)

    solubility

    (b)

    melting point

    (c)

    boiling point

    (d)

    adsorption

  8. For a simple distillation process we need to have

    (a)

    an evaporating dish

    (b)

    a separating funnel

    (c)

    a filter with filter paper

    (d)

    a Liebig condenser

  9. Change in the number of neutrons in an atom changes it to

    (a)

    an ion

    (b)

    an isotope

    (c)

    an isobar

    (d)

    another element

  10. The number of protons, neutrons and electrons present respectively in \(_{ 35 }^{ 80 }{ Br }\)

    (a)

    80, 80, 35

    (b)

    35, 55,80

    (c)

    35, 35, 80

    (d)

    35, 45, 35

  11. The bending of root of a plant in response to water is called _________ 

    (a)

    thigmonasty

    (b)

    phototropism

    (c)

    hydrotropism

    (d)

    photonasty

  12. During photosynthesis plants exhale _______. 

    (a)

    Carbon dioxide

    (b)

    oxygen

    (c)

    hydrogen

    (d)

    helium

  13. Which is not an insect?

    (a)

    House fly

    (b)

    Bedbug

    (c)

    Mosquito

    (d)

    Spider

  14. An internal factor responsible for spoilage of food is _______________

    (a)

    Wax coating

    (b)

    Contaminated utensils

    (c)

    Moisture content in food

    (d)

    Synthetic preservatives

  15. _________ belongs to the generation IV of the computer

    (a)

    Microprocessor

    (b)

    Artificial intelligence

    (c)

    Transistor

    (d)

    Vaccum Tubes

  16. Section-B

    10 x 1 = 10
  17. The radius of a thin wire is measured by ________

    ()

    Screw gauge

  18. Speed is a ____________ quantity whereas velocity is a ____________ quantity

    ()

      scalar, vector

  19. A negative sign in the value of magnification indicates that the image is________

    ()

      real

  20. In petroleum refining, the method of separation used is _______

    ()

    Fractional distillation

  21. The number of neutrons present in \(_{ 3 }^{ 7 }{ Li }\) is ------

    ()

      4 

  22. __________ is positively hydrotropic as well as positively geotropic.

    ()


    Root

  23. Photosynthesis : ____________ Transpiration : Stomata

    ()


     

  24. When the leaves of a sensitive plant are touched with a finger, they fold up and when light fades at dusk the petals of a Dandelion flower close. These two plants show ____ and_____ movements.

    ()


    Thigmonasty ; Photonasty

  25. Placenta is the unique characteristic feature of ______________.

    ()

    Mammals

  26. Vitamin Rich source Deficiency disease
    Calciferol   Rickets
      Papaya Night blindness
    Ascorbic acid    
      Whole grains Beriberi
    ()
    Vitamin Rich source Deficiency disease
    Calciferol egg , liver Rickets
    Retinol Papaya Night blindness
    Ascorbic acid Sprouts, Citrus fruits leafy vegetables Scurvy
    Thiamine Whole grains Beriberi
  27. Section-C

    10 x 1 = 10
  28. Motion with non uniform acceleration

  29. (1)

    Positive phototropism.

  30. Constant retardation

  31. (2)

    Infinity - Highly Magnified, Real, inverted

  32. Mirage

  33. (3)

  34. At focus F

  35. (4)

    convex mirror

  36. Mass of electron

  37. (5)

    Positive Phototropism

  38. Charge of proton

  39. (6)

    II generation

  40. Shoots growing towards the light

  41. (7)

    1.6 x 10-19C

  42. Roots growing downwards away from light

  43. (8)

  44. Iodine

  45. (9)

    Goitre

  46. Transistor

  47. (10)

    9.31 x 10-28g

    Section-D

    10 x 1 = 10
  48. Kilometre is one of the SI units of measurement

    (a) True
    (b) False
  49. One Celsius degree is an interval of 1K and zero degree Celsius is 273.15 K

    (a) True
    (b) False
  50. Distance covered by a particle never becomes zero between any interval of time but displacement becomes zero

    (a) True
    (b) False
  51. Light is one of the slowest travelling energy with a speed 3 \(\times\)10-8 ms-1

    (a) True
    (b) False
  52. Sublimation is the property of a substance to directly change from liquid to solid state.

    (a) True
    (b) False
  53. In an atom, electrons revolve around the nucleus in fixed orbits

    (a) True
    (b) False
  54. Photosynthesis produces glucose and carbon dioxide.

    (a) True
    (b) False
  55. Nephridia are the respiratory organ of Annelida

    (a) True
    (b) False
  56. Bipinnaria is the larva of Mollusca

    (a) True
    (b) False
  57. Vitamins are required in large quantities for normal functioning of the body -

    (a) True
    (b) False
  58. Section-E

    2 x 2 = 4
  59. What is the difference between movement of flower in sunflower plant and closing of the leaves in the Mimosa pudica.?

  60. Define photosynthesis.

  61. Section-F

    4 x 2 = 8
  62. Define standard unit.

  63. Convert : 300 K into Celsius scale,

  64. According to cartesion sign convention, which mirror and which lens has negative focal length?

  65. How gaseous pressure arises?

  66. Section-G

    6 x 3 = 18
  67. What is the measuring unit of the thickness of a plastic carry bag?

  68. A sound is heard 5 s later than the lightning is seen in the sky on a rainy day. Find the distance of location of lightning? Given the speed of sound = 346 ms-1

  69. a) Complete the diagram to show how a concave mirror forms the image of the object.
    b) What is the nature of the image?

  70. How is the body wall of coelenterates arranged?

  71. Write any one function of the following minerals
    a) Calcium   b) Sodium
    c) Iron          d) Iodine

  72. Differentiate data and information.

  73. Section-H

    5 x 5 = 25
  74. A ball is gently dropped from a height of 20m. If its velocity increases uniformly at the rate of 10 ms-2 with what velocity will it strike the ground? After what time will it strike the ground?

  75. Find the size, nature and position of image formed when an object of size 1 cm is placed at a distance of 15 cm from a concave mirror of focal length 10 cm.

  76. Hydrogen sulphide (H2S) contains 94.11% sulphur, water (H2O) contains 11.11% hydrogen and sulphur dioxide (SO2) contains 50% of oxygen. Show that the results are in agreement with the law of reciprocal proportions

  77. How are vitamins useful to us? Tabulate the sources, deficiency diseases and symptoms of fat soluble vitamins

  78. What are the different steps involved in data processing?

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