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8th Science - Term 2 Atomic Structure One Mark Questions with Answer Question Bank Software Nov-01 , 2019

Term 2 Atomic Structure

8th Science - Term 2 Atomic Structure One Mark Questions with Answer

Term 2 Atomic Structure One Mark Questions with Answer

8th Standard

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Science

Time : 00:30:00 Hrs
Total Marks : 16
    5 x 1 = 5

  1. The same proportion of carbon and oxygen in the carbon dioxide obtained from different sources proves the law of __________

    (a)

    reciprocal proportion

    (b)

    definite proportion

    (c)

    multiple proportion

    (d)

    conservation of mass

  2. Cathode rays are made up of

    (a)

    neutral particles

    (b)

    positively charged particles

    (c)

    negatively charged particles

    (d)

    None of the above

  3. In water, hydrogen and oxygen are combined in the ratio of _______by mass.

    (a)

    1:8

    (b)

    8:1

    (c)

    2:3

    (d)

    1:3

  4. 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

  5. In all atoms of an element

    (a)

    the atomic and the mass number are same.

    (b)

    the mass number is same and the atomic number is different

    (c)

    the atomic number is same and the mass number is different

    (d)

    both atomic and mass numbers may vary.

    6. 6 x 1 = 6

  6. _______ is the smallest particle of an element.

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    Atom

  7. An element is composed of _________ atoms.

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    similar

  8. An atom is made up of _________, _________ and _________.

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    proton, electron and neutron

  9. A negatively charged ion is called _________, while positively charged ion is called __________

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    anion, cation

  10. _______ is a negatively charged particle (Electron/Proton).

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    Electron

  11. Proton is deflected towards the _________ charged plate (positively, negatively).

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    negatively

    12. 5 x 1 = 5

  12. Law of conservation of mass

    13. (1)

    Lavoisier

  13. Law of constant proportion

    14. (2)

    James Chadwick

  14. Cathode rays

    15. (3)

    Joseph Proust

  15. Anode rays

    16. (4)

    Goldstein

  16. Neutrons

    17. (5)

    Sir William Crookes

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