Structure Of The Atoms Test

Structure Of The Atoms

This is Structure Of The Atoms Test-01 for CBSE class 09 Science.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Which of the following is regarded as a universal particle?
  • A
    All of these
  • B
    Proton
  • C
    Electron
    Correct
  • D
    Neutron
2
Who discovered anode rays?
  • A
    Chadwick
  • B
    Goldstein
    Correct
  • C
    J. J. Thomson
  • D
    Rutherford
3
“Electrons present in the extra nuclear portion are not stationary rather they revolve around the nucleus at high speed following a circular path” Who said this?
  • A
    Rutherford
    Correct
  • B
    J. J. Thomson
  • C
    Neil Bons
  • D
    Chadwick
4
Find the incorrect statement
  • A
    Neutron is slightly heavier than proton
  • B
    Neutrons were known at the time of Rutherford performed the scattering experiment
  • C
    Proton is a universal particle.
    Correct
  • D
    Most of the space in atom is empty
5
How many times is radius of extra nuclear portion more than that of the nucleus of an atom?
  • A
    10 times
  • B
    2 times
  • C
    3 times
  • D
    Five times
    Correct
6
Who got the Noble Prize for the work on the structure of atom?
  • A
    J. J. Thomason
  • B
    Neil Bohr
    Correct
  • C
    E. Rutherford
  • D
    J. Chadwick
7
Out of L and M shells which is near to the nucleus of an atom?
  • A
    m
  • B
    both are equally near to the nucleus of an tom
  • C
    L
    Correct
  • D
    None of these
8
What was the source of alpha particles in Rutherford scattering experiment?
  • A
    All of these
  • B
    Hydrogen nucleus
  • C
    Helium nucleus
    Correct
  • D
    Neon nucleus
9
Who discovered neutron?
  • A
    Maxwell
  • B
    Rutherford
  • C
    Chadwick
    Correct
  • D
    J. J. Thomson
10
‘Christmas Pudding Model’ of an atom was suggested by
  • A
    Stony
  • B
    J. J. Thomson
    Correct
  • C
    Neil Bohr
  • D
    Rutherford
11
Which of the following air pressures in the discharge tube is appropriate for the production of cathode rays?
  • A
    0.001 mm
    Correct
  • B
    1 cm
  • C
    0.001 cm
  • D
    1 mm
12
Rutherford’s alpha-particle experiment was responsible for discovery of
  • A
    Nucleus
    Correct
  • B
    Electron
  • C
    Proton
  • D
    Neutron
13
According to \({\text{2}}{{\text{n}}^{\text{2}}}\)rule 32 electrons can be assigned to which shell-
  • A
    K- shell
  • B
    M-shell
  • C
    L-shell
  • D
    N-shell
    Correct
14
If K and L shells of an atom are full, then what would be the number of electrons in the atom?
  • A
    18
  • B
    2
  • C
    8
  • D
    10
    Correct
15
What is the e/m value of an electron?
  • A
    \({\text{1}}.{\text{8 }} \times {\text{ 1}}{0^{{\text{12}}}}{\text{ c / kg}}\)
  • B
    None of these
  • C
    \({\text{1}}.{\text{6 }} \times {\text{ 1}}{0^{{\text{11}}}}{\text{ c}}/{\text{kg}}\)
  • D
    \({\text{1}}.{\text{76 }} \times {\text{ 1}}{0^{{\text{11}}}}{\text{ c / kg}}\;{\text{ }}\)
    Correct