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Structure of th...

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  • Question 1
    1 / -0

    Which of the following is not observed by Rutherford in α-particle scattering experiment?
    (a) Most of the α-particles rebound after hitting the gold foil.
    (b) Some of the particles deflect by their path.
    (c) Some of the particles do not pass through the goil foil.
    (d) Most of the particles pass straight through the gold foil.

  • Question 2
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    Which of the following is correct about an atom?
    (a) It is the smallest unit of matter.
    (b) Size of an atom is very large as compared to the size of nucleus of the atom.
    (c) In an atom, the number of protons is equal to the number of electrons.
    (d) Atoms are stable.

  • Question 3
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    Which of the following statements is/are correct about β-particles :
    (a) They are electrons.
    (b) They are deflected towards positive electrode.
    (c) They travel at the speed of sound.
    (d) They are deflected towards negative electrode.

  • Question 4
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    The electronic configuration of an element A is 2, 8, 6. How many electrons does it require to have a stable configuration?

  • Question 5
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    The number of valence electrons in Cl- ion is:

  • Question 6
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    Which element(s) have 7 electrons in their valence shell?

  • Question 7
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    What is the physical state of water at 100C ?

  • Question 8
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    Match the following with the correct response:

     (1) Carbon  (A) 2,8,1
     (2) Sodium  (B) 2
     (3) Argon  (C) 2,8,8
     (4) Helium  (D) 2,4

  • Question 9
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    Which of the following elements have the same valency?
    (a) An element with atomic number 12
    (b) An element with atomic number 6
    (c) An element with atomic number 4
    (d) An element with atomic number 2

  • Question 10
    1 / -0

    What is the actual mass of a proton?

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