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

8th Standard

    Reg.No. :
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Science

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

    Part A

    20 x 1 = 20
  1. Amount of substance is

    (a)

    directly proportional to the number of atoms

    (b)

    inversely proportional to the number of atoms

    (c)

    directly proportional to the square of number of atoms

    (d)

    inversely proportional to the square of number of atoms

  2. Pascal’s law is used in

    (a)

    hydraulic lift

    (b)

    brake system

    (c)

    pressing heavy bundles

    (d)

    All the above

  3. If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?

    (a)

    10 cm

    (b)

    5 cm

    (c)

    20 cm

    (d)

    15 cm

  4. Mirrors which magnify the object placed close to them.

    (a)

    Convex mirror

    (b)

    Concave mirror

    (c)

    Plane mirror

    (d)

    ellipsoid mirror

  5. Which one of the element name not derived from planet?

    (a)

    Plutonium

    (b)

    Neptunium

    (c)

    Uranium

    (d)

    Mercury

  6. ______ metal undergoes rusting.

    (a)

    tin

    (b)

    sodium

    (c)

    copper

    (d)

    iron

  7. _________ is an example for colonial form of algae.

    (a)

    Oscillatoria

    (b)

    Nostac

    (c)

    Volvox

    (d)

    Chlorella

  8. __________ is tough and thick white sheath that protect the inner parts of the eye.

    (a)

    sclera

    (b)

    conjunctiva

    (c)

    cornea

    (d)

    iris

  9. Fifth generation computer has ___________ Intelligence.

    (a)

    Transistors

    (b)

    Integrated Circuits

    (c)

    Microprocessor

    (d)

    Artificial Intelligence

  10. If you apply equal amount of heat to a solid, liquid and gas individually, which of the following will have more expansion?

    (a)

    Solid

    (b)

    Liquid

    (c)

    Gas

    (d)

    All of them

  11. An electroscope has been charged by induction with the help of charged glassrod. The charge on the electroscope is

    (a)

    negative

    (b)

    positive

    (c)

    both positive and negative

    (d)

    None of the above

  12. Which of the following is known as azote?

    (a)

    Oxygen

    (b)

    Nitrogen

    (c)

    Sulpher

    (d)

    Carbon dioxide

  13. Many adolescent boys and girls get pimples on face, due to the secretions of _________ gland.

    (a)

    sweat

    (b)

    sebaceous

    (c)

    sweat and sebaceous

    (d)

    None of these

  14. What is the short cut key for undo option?

    (a)

    Ctrl + Z

    (b)

    Ctrl + R

    (c)

    Ctrl + Y

    (d)

    Ctrl + N

  15. Noise is produced by

    (a)

    vibrations with high frequency.

    (b)

    regular vibrations.

    (c)

    regular and periodic vibrations.

    (d)

    irregular and non-periodic vibrations.

  16. MRI stands for __________.

    (a)

    Magnetic Resonance Imaging

    (b)

    Magnetic Running Image

    (c)

    Magnetic Radio Imaging

    (d)

    Magnetic Radar Imaging

  17. Cryogenic fuels are stored at

    (a)

    room temperature

    (b)

    low temperature

    (c)

    very low temperature

    (d)

    very high temperature

  18. Sodium hydroxide is a ____________

    (a)

    acid

    (b)

    base

    (c)

    oxide

    (d)

    alkali

  19. __________ is the coal of superior quality.

    (a)

    Peat

    (b)

    Lignite

    (c)

    Bituminous

    (d)

    Anthracite

  20. The plants found in a particular area are known as ________

    (a)

    fauna

    (b)

    flora

    (c)

    endemic

    (d)

    rare

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