STRUCTURE OF ATOM Test

STRUCTURE OF ATOM

This is STRUCTURE OF ATOM Test-03 for CBSE class 12 Chemistry.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Experiments on electrical discharge through gases ultimately lead to the discovery of
  • A
    nucleus
  • B
    protons
  • C
    electrons
    Correct
  • D
    neutrons
2
Television pictures result due to
  • A
    fluorescence of canal rays on the television screen
  • B
    phosphorescence of protons on the television screen
  • C
    fluorescence of protons on the television screen
  • D
    fluorescence of cathode rays on the television screen
    Correct
3
The mass of an electron is
  • A
    9.1094 x $10^{-31}$ kg
    Correct
  • B
    1.758820 x $10^{11}$
  • C
    1.672614 x $10^{-27}$-kg
  • D
    1.67492 x$10^{-27}$kg
4
The formula E= h$\nu $ is used to calculate
  • A
    energy of quantum
    Correct
  • B
    radiation emitted by a black body
  • C
    wave number
  • D
    Energy of the ejected electrons
5
Wave number of yellow radiations having wavelength of 5800 $A^0$.
  • A
    1.72 x $10^2$ $m^{-1}$
  • B
    1.72 x $10^3$ $m^{-1}$
  • C
    1.72 x $10^5$ $m^{-1}$
  • D
    1.72 x $10^6$ $m^{-1}$
    Correct
6
Electronic configuration of the element having atomic number 24.
  • A
    Option A
  • B
    Option B
    Correct
  • C
    Option C
  • D
    Option D
7
The electronic configuration $1{s^2}2{s^2}2{p^1}$ belongs to
  • A
    Beryllium
  • B
    Boron
    Correct
  • C
    carbon
  • D
    lithium
8
Around $10^{15}$ Hz corresponds to the region of the electromagnetic spectrum
  • A
    infrared region
  • B
    microwave region
  • C
    ultraviolet region
  • D
    visible light
    Correct
9
Radio frequency region of the electromagnetic spectrum is used for broadcasting. It is
  • A
    Around $10^6$ Hz
    Correct
  • B
    Around $10^15$ Hz
  • C
    Around $10^13$ Hz
  • D
    Around $10^10$ Hz
10
One of the orbitals is non-directional
  • A
    d- orbital
  • B
    s- orbital
    Correct
  • C
    f- orbital
  • D
    p- orbital
11
Find energy of the photons which correspond to light of frequency $3× 10^{15}$ Hz (Hint: h = Planck’s constant = 6.626 × $10^{-34} Js)
  • A
    1.988 × $10^{-18}$ J
    Correct
  • B
    0.988 × $10^{-18}$ J
  • C
    1.308 × $10^{-18}$ J
  • D
    2.988 × $10^{-18}$ J
12
Find energy of the photon which has wavelength of 0.50 Å. (Hint: h = Planck’s constant = 6.626 × $10^{-34}$ J)
  • A
    0.98 × $10^{-15}$ J
  • B
    3.98 × $10^{-15}$ J
    Correct
  • C
    2.98 × $10^{-15}$ J
  • D
    1.98 × $10^{-15}$ J
13
Energy of an electron in stationary state is given by the formula where n=1,2,3....... . In this equation, $R _H$ is called
Question 13 figure 1
  • A
    Proportionality constant
  • B
    Planck’s constant
  • C
    Rydberg’s constant
    Correct
  • D
    Avagadro’s Number
14
Lines in the hydrogen spectrum which appear in the ultraviolet region of the electromagnetic spectrum, then they are called as
  • A
    Lyman series
    Correct
  • B
    Pfund series,
  • C
    Balmer series
  • D
    Bracket series
15
Lines in the hydrogen spectrum which appear in the infrared region of the electromagnetic Spectrum, then they are called as
  • A
    hydrogen series
  • B
    Paschen series
    Correct
  • C
    Balmer series
  • D
    hydrogen line series