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

8th Standard

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Science

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

    Part A

    20 x 1 = 20
  1. Luminous intensity is the intensity of

    (a)

    Laser light

    (b)

    UV light

    (c)

    visible light

    (d)

    IR light

  2. The unit of charge is ______

    (a)

    Coulomb

    (b)

    Ampere

    (c)

    Radian

    (d)

    Steradian

  3. Pascal’s law is used in

    (a)

    hydraulic lift

    (b)

    brake system

    (c)

    pressing heavy bundles

    (d)

    All the above

  4. 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

  5. When the angle of inclination decreases the number of images formed _________

    (a)

    increase

    (b)

    decreases

    (c)

    remain same

    (d)

    none of the above

  6. The property which allows metals to be hammered into their sheets is ___________

    (a)

    ductility

    (b)

    malleability

    (c)

    conductivity

    (d)

    tensile strength

  7. Limestone contains ______ mainly.

    (a)

    Calcium chloride

    (b)

    calcium carbonate

    (c)

    calcium nitrate

    (d)

    calcium sulphate

  8. The brown colour of a cut apple is due to

    (a)

    rusting

    (b)

    rancidity

    (c)

    browning

    (d)

    fermentation

  9. Solanum trilobatum is the binomial name of Thoothuvalai. Here the word ‘Solanum’ refers to

    (a)

    Species

    (b)

    Genus

    (c)

    Class

    (d)

    Orders

  10. Maintenance of constant internal environment of the body is known as _________

    (a)

    Homeostasis

    (b)

    Homeophytes

    (c)

    Homeokinesis

    (d)

    Homeophilics

  11. Fifth generation computer has ___________ Intelligence.

    (a)

    Transistors

    (b)

    Integrated Circuits

    (c)

    Microprocessor

    (d)

    Artificial Intelligence

  12. 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

  13. Which of the following statements made by Dalton has not undergone any change?

    (a)

    Atoms cannot be broken.

    (b)

    Atoms combine in small, whole numbers to form compounds.

    (c)

    Elements are made up of atoms.

    (d)

    All atoms of an elements are alike

  14. The period at which an organism attains sexual maturity is called _____________

    (a)

    puberty

    (b)

    adolescence

    (c)

    growth

    (d)

    maturity

  15. Which tool bar is used for drawing and editing controls in tux paint software?

    (a)

    Left Side: Toolbar

    (b)

    Right side: Toolbar

    (c)

    Middle: Tool bar

    (d)

    Bottom: Tool bar

  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. Chandrayaan - 1 was launched on

    (a)

    22nd October 2008

    (b)

    8th November 2008

    (c)

    22nd July 2019

    (d)

    22nd October 2019

  18. Acids are ________ in taste.

    (a)

    sour

    (b)

    sweet

    (c)

    bitter

    (d)

    salty

  19. The chemical mixed with LPG that helps in the detection of its leakage is __________

    (a)

    methanol

    (b)

    ethanol

    (c)

    camphor

    (d)

    mercapton

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

    (a)

    fauna

    (b)

    flora

    (c)

    endemic

    (d)

    rare

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