STRUCTURE OF ATOM Test

STRUCTURE OF ATOM

This is STRUCTURE OF ATOM Test-04 for CBSE class 12 Chemistry.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Lines in the hydrogen spectrum which appear in the visible region of the electromagnetic Spectrum, then they are called as
  • A
    Balmer series
    Correct
  • B
    Lyman series
  • C
    Paschen series
  • D
    Bracket series
2
The commonly occurring isotopes of carbon atoms are: ${_6^{12}}C{,_6}^{13}C{,_6}^{14}C$ . They contain:
  • A
    6, 7 and 8 neutrons and 6 protons
    Correct
  • B
    7, 8 and 9 neutrons 6 protons
  • C
    6, 7 and 9 neutrons and 6 protons
  • D
    6, 8 and 9 neutrons and 6 protons
3
How many protons, neutrons and electrons are in $^{56}F{e^{3 + }}$?
  • A
    23 protons, 33 neutrons, 20 electrons
  • B
    23 protons, 33 neutrons, 26 electrons
  • C
    26 protons, 30 neutrons, 26 electrons
  • D
    26 protons, 30 neutrons, 23 electrons
    Correct
4
Give the number of electrons in the species, $O_2$ and $O_{2+}$ .
  • A
    16 and 14
  • B
    32 and 16
  • C
    16 and 8
  • D
    16 and 15
    Correct
5
An atom of an element contains 29 electrons and 35 neutrons. The number of protons are:
  • A
    29
    Correct
  • B
    30
  • C
    35
  • D
    32
6
Values of e/m (charge/mass) in the categories alpha particle (α), electron (e) and protons (p) increase in the order:
  • A
    p < e < α
  • B
    e < α < p
  • C
    a< p < e
    Correct
  • D
    α < e < p
7
The atom with the given atomic number Z=17, and the atomic mass A=35.5 is
  • A
    ${}_{17}^{35}Mg$
  • B
    ${}_{17}^{35}cl$
    Correct
  • C
    ${}_{17}^{35}Al$
  • D
    ${}_{17}^{35}Br$
8
An atom of an element contains 29 electrons and 35 neutrons. The electronic configuration of the element
  • A
    Option A
  • B
    Option B
  • C
    Option C
    Correct
  • D
    Option D
9
In an atom, an electron is moving with a speed of 600m/s with an accuracy of 0.005%. Certainity with which the position of the electron can be located is (h = 6.6 ×$10^{-34}$ Js)
  • A
    1.52 ×$10^{-4}$m
  • B
    1.92 ×$10^{-3}$m
    Correct
  • C
    3.84 ×$10^{-3}$m
  • D
    5.10 ×$10^{-3}$m
10
The ionization energy of the lowest state, also called as the ground state, is:
  • A
    1.18 ×$ \times {10^{ - 18}}J{\text{ }}ato{m^{ - 1}}\;$
  • B
    0.18 ×$ \times {10^{ - 18}}J{\text{ }}ato{m^{ - 1}}\;$
  • C
    2.18 ×$ \times {10^{ - 18}}J{\text{ }}ato{m^{ - 1}}\;$
    Correct
  • D
    3.18 ×$ \times {10^{ - 18}}J{\text{ }}ato{m^{ - 1}}\;$
11
Calculate the energy required for the process$H{e^ + }\left( g \right){\text{ }} \to {\text{ }}H{e^{2 + }}\left( g \right){\text{ }} + {\text{ }}{e^{\_.}}$ (Hint: The ionization energy of the lowest state, also called as the ground state, is 2.18×$10^{-18}$ J atom-1 ):
  • A
    8.72 ×${10^{ - 18}}J{\text{ }}ato{m^{ - 1`}}$
    Correct
  • B
    3.72 ×${10^{ - 18}}J{\text{ }}ato{m^{ - 1`}}$
  • C
    7.72 ×${10^{ - 18}}J{\text{ }}ato{m^{ - 1`}}$
  • D
    5.72 ×${10^{ - 18}}J{\text{ }}ato{m^{ - 1`}}$
12
The electrons are ejected from the metal surface as soon as the beam of light strikes the surface is called
  • A
    Planck.s quantum theory
  • B
    Photoelectric effect.
    Correct
  • C
    Thomson model for electron
  • D
    Faraday’s cathode ray discharge model
13
What transition in the hydrogen spectrum would have the same wavelength as the Balmer transition n = 4 to n = 2 of He+ spectrum?
  • A
    n = 4 to n = 1
  • B
    n = 4 to n = 2
  • C
    n = 2 to n = 1
    Correct
  • D
    n = 6 to n = 1
14
2 × $10^8$ atoms of carbon are arranged side by side. Calculate the radius of carbon atom if the length of this arrangement is 2.4 cm
  • A
    5.7 × $10^{-11}$ m
  • B
    6.0 × $10^{-11}$ m
    Correct
  • C
    1.2 × $10^{-11}$ m
  • D
    3.0 × $10^{-11}$ m
15
Which of the following orbitals are not possible?
  • A
    3s
  • B
    3f
    Correct
  • C
    4d
  • D
    3p