8th Standard Science English Medium Free Online Test 1 Mark Questions 2020 - 2021 Part - Five

8th Standard

    Reg.No. :
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Science

Time : 00:20:00 Hrs
Total Marks : 20

    Part A

    20 x 1 = 20
  1. Quantities other than base quantities are called as

    (a)

    supplementary quantities

    (b)

    derived quantities

    (c)

    professional quantities

    (d)

    energy quantities

  2. Electric current (I) = ____________

    (a)

    Qt

    (b)

    t/Q

    (c)

    Q/t

    (d)

    Q/t2

  3. Which of the following liquids has more viscosity?

    (a)

    Grease

    (b)

    Water

    (c)

    Coconut oil

    (d)

    Ghee

  4. The unit for surface tension is _________

    (a)

    Nm

    (b)

    N-1m

    (c)

    N-1m-1

    (d)

    Nm-1

  5. Focal length is equal to half of the

    (a)

    centre of curvature

    (b)

    axis

    (c)

    radius of curvature

    (d)

    None of the above

  6. The non-metal which conduct current is

    (a)

    carbon

    (b)

    oxygen

    (c)

    aluminium

    (d)

    sulphur

  7. Which of the following does not possess metallic lustre?

    (a)

    Copper

    (b)

    Calcium'

    (c)

    aluminium

    (d)

    gold

  8. Which of the following factor induces electrolysis?

    (a)

    Heat

    (b)

    light

    (c)

    electricity

    (d)

    catalysis

  9. The edible mushroom is _________

    (a)

    Polyporus

    (b)

    Agaricus

    (c)

    Pennicillium

    (d)

    Aspergillus

  10. The erythrocyte is placed in _________ solution which has lesser concentration of solutes and greater concentration of water than in the cytoplasm.

    (a)

    Hypotonic

    (b)

    Hypertonic

    (c)

    Neutral

    (d)

    Acidic

  11. If you apply some heat energy to a substance, which of the following can take place in it?

    (a)

    Expansion

    (b)

    Increase in temperature

    (c)

    Change of state

    (d)

    All the above

  12. Fuse is

    (a)

    a switch

    (b)

    a wire with low resistance

    (c)

    a wire with high resistance

    (d)

    a protective device for breaking an electric circuit

  13. Cathode rays are made up of

    (a)

    neutral particles

    (b)

    positively charged particles

    (c)

    negatively charged particles

    (d)

    None of the above

  14. Adolescence is the period of life between _____________ years of age.

    (a)

    10 to 16

    (b)

    11 to 17

    (c)

    11 to 19

    (d)

    11 to 20

  15. In Tux Math, space cadet option is used for_________.

    (a)

    simple addition

    (b)

    division

    (c)

    drawing

    (d)

    multiplication

  16. The range of audible frequency for the human ear is

    (a)

    2 Hz to 2000 Hz

    (b)

    20 Hz to 2000 Hz

    (c)

    20 Hz to 20000 Hz

    (d)

    200 Hz to 20000 Hz

  17. Mangalyaan was sent to ________

    (a)

    Moon

    (b)

    Mars

    (c)

    Venus

    (d)

    Mercury

  18. Permanent hardness of water is due to the presence of __________

    (a)

    Sulphates and Chlorides

    (b)

    Dust particles

    (c)

    Carbonates and Bicarbonates

    (d)

    Other soluble particles

  19. We brush our teeth with tooth paste because it is __________ in nature.

    (a)

    basic

    (b)

    acidic

    (c)

    basic and acidic

    (d)

    None of these

  20. Effective microorganism preparation is not used in

    (a)

    seed treatment

    (b)

    foliar spray

    (c)

    soil treatment

    (d)

    bio-predators

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