Practice test

Atomic structure - Test Set 2

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    CDS 2017
    There are two elements calcium (atomic no. 20) and argon (atomic no. 18) both elements have same mass number 40. These elements are called
    1. isoneutronic
    2. isochoric
    3. isobars
    4. isotopes
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  2. Question 2

    CDS 2017
    The chemical properties of an element depend on
    1. the number of electrons present in the outer orbit of the atomic element
    2. the number of isotopes of the element
    3. the mass number of the element
    4. the number of neutrons present in the atomic element
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  3. Question 3

    RRB NTPC 2016
    Who was the inventor of radioactivity?
    1. Madam Curie
    2. Irine Curie
    3. Henri Becquerel
    4. Rutherford
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  4. Question 4

    SSC 2016
    Which of the following is the unit of radioactivity?
    1. Angstrom
    2. Candela
    3. Fermi
    4. Curie
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  5. Question 5

    NDA 2020
    Which one of the following types of radiations has the smallest wavelength?
    1. Microwaves
    2. Infra-red
    3. Visible light
    4. X-rays
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  6. Question 6

    BSSC 2016
    In which types of reaction the most harmful radiation produces?
    1. Fusion reaction
    2. Fission reaction
    3. Chemical reaction
    4. Photochemical reaction
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  7. Question 7

    SSC 2016
    Atom bomb is based on which of the following principle?
    1. Uncontrolled nuclear fusion
    2. Uncontrolled nuclear fission
    3. Controlled nuclear fission
    4. Controlled nuclear fusion
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  8. Question 8

    SSC 2016
    The name of atomic bombs dropped on Japan were
    1. Little Boy and Fat Man
    2. Little Man and Fat Boy
    3. Little Girl and Fat Boy
    4. Little Woman and Fat Girl
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  9. Question 9

    SSC 2017
    The basic principle of nuclear reactors is
    1. Fusion
    2. Radioactivity
    3. Fission
    4. None of the above
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  10. Question 10

    CDS 2017
    Which one of the following radioactive substances enters/enter the human body through food chain and causes/cause many physiological disorders?
    1. Strontium - 90
    2. Iodine - 131
    3. Cesium - 137
    4. All of the above
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  11. Question 11

    NDA 2018
    Consider the following statements about Visible light, UV light and X-rays.
    I. The wavelength of visible light is more than that of X-rays.
    II. The energy of X-ray photons is higher than that of UV light photons.
    III. The energy of UV light photons is less than that of visible light photons.
    Which of the statement(s) given above is/are correct?
    1. I, II and III
    2. I and II
    3. II and III
    4. Only I
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  12. Question 12

    RRB NTPC 2021
    Name the scientist who propounded a thoery that electrons are trapped in a positively charged sphere.
    1. E. Rutherford
    2. J.J. Thomson
    3. Camillo Golg
    4. Neils Bohr
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  13. Question 13

    RRB NTPC 2021
    Which sub-atomic particle was discovered by J Chadwick?
    1. Proton
    2. Electron
    3. Neuron
    4. Neutron
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  14. Question 14

    RRB JE CBT-II 2019
    Who discovered electron?
    1. Michall Faraday
    2. J.J. Thomson
    3. Albert Einstein
    4. J.C. Bose
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  15. Question 15

    RRB JE 2019
    In the nucleus of an atom.......... found?
    1. neutron
    2. electron
    3. protons
    4. protons and neutrons
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  16. Question 16

    RRB NTPC 2016
    .......... is electrically neutral and weakly micro atom.
    1. neutrino
    2. neutrino
    3. electron
    4. proton
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  17. Question 17

    RRB NTPC 2016
    Which of the following particles has positive charge?
    1. neutron
    2. proton
    3. electron
    4. krypton
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  18. Question 18

    RRB NTPC 2016
    Sub-atomic particles which have opposite
    properties from normal sub-atomic particles
    are known as?
    1. positron
    2. anti-particles
    3. photons
    4. neutrinos
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  19. Question 19

    RRB Group-D 2018
    Who discovered the word 'atom'?
    1. Dalton
    2. Kanad
    3. Lavoisier
    4. Democritus
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  20. Question 20

    Neutron is present in all atoms except..........
    1. Cr
    2. H
    3. C
    4. Mg
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