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Free download in PDF Atomic structure Multiple Choice Questions(MCQs) & Answers. These multiple choice questions are very useful to students for an interview.
(1)
Why has nuclear energy become an inevitable option for the development of the country?
[A]
Because less pollution caused by nuclear plant
[B]
High efficiency of nuclear energy
[C]
Due to acute shortage of other sources of energy
[D]
High cost of energy production of other sources
Answer: Due to acute shortage of other sources of energy
(2)
How much amount of nuclear energy burnt is equivalent to the energy produced by 3000 tonnes of coal?
[A]
20kg
[B]
15kg
[C]
5kg
[D]
1kg
(3)
What is the most attractive part of nuclear energy?
[A]
Supports countries development
[B]
Has high efficiency of energy production
[C]
Is available in abundance
[D]
Causes no pollution
Answer: Causes no pollution
(4)
Nucleus consists of two sub-particles known as?
[A]
Nucleons
[B]
Neutrons
[C]
Nucleosides
[D]
Nucleotides
(5)
The atom as a whole is electrically charged.
[A]
True
[B]
Can´t be determine
[C]
Both can be
[D]
False
(6)
On which law is the nuclear energy explained?
[A]
Mendeleev law
[B]
Rutherford law
[C]
Newton’s law
[D]
Einstein’s law
(7)
Number of protons in the nucleus is called ___________
[A]
Atomic number
[B]
Mass number
[C]
Electric charge
[D]
Periodic number
(8)
The total number of nucleons in the nucleus is called _________
[A]
Atomic number
[B]
Electric charge
[C]
Mass number
[D]
Periodic number
(9)
To disrupt a nucleus and separate in into its component nucleons, energy must be supplied from outside and this energy is called?
[A]
Bonding energy
[B]
Kinetic energy
[C]
Binding energy
[D]
Nuclear energy
(10)
The net neutrons produced per initial neutron accounting for all possible losses is called?
[A]
Bombardment
[B]
Half life
[C]
Multiplication factors
[D]
Covalent bond
Answer: Multiplication factors
(11)
What is the time during which one half of a number of radioactive species decays or one half of their activity ceases?
[A]
Super critical state
[B]
Semi life
[C]
Critical life
[D]
Half Life
(12)
Electrons that orbit outermost shell of an atom are called?
[A]
Valence electrons
[B]
Electrons
[C]
Electron Coefficients
[D]
Neutrons
Answer: Valence electrons
(13)
A covalent bond is also called as ____
[A]
Atomic bond
[B]
Metal bond
[C]
Molecular bond
[D]
Metal bond
(14)
Which of the following statements is not true with respect to photoelectric effect -
[A]
The plot of kinetic energy of the photoelectrons against frequency of absorbed radiation gives a straight line parallel to x-axis
[B]
The plot of K.E. of the photoelectrons against frequency of absorbed radiation gives a straight line with slope equal to h and intercept ro
[C]
The plot of kinetic energy of the photoelectrons versus the intensity of incident radiation with constant frequency gives a straight line parallel to x-axis
[D]
When intensity of light is increased the number of photons ejected increases but the energies of these electrons are the same
Answer: The plot of kinetic energy of the photoelectrons against frequency of absorbed radiation gives a straight line parallel to x-axis
(15)
Who is credited with the discovery of electron?
[A]
James Chadwick
[B]
Ernest Rutherford
[C]
Niels Bohr
[D]
JJ Thomson
(16)
An atom has a mass number of 37 and atomic number 17. How many protons does it have?
[A]
20
[B]
54
[C]
17
[D]
21
(17)
Which of the following mostly accounts for the mass of an atom?
[A]
Neutrons
[B]
Neutron and proton
[C]
Electron and proton
[D]
Electron and neutron
Answer: Neutron and proton
(18)
Which metal was used by Rutherford in his alpha-scattering experiment?
[A]
Gold
[B]
Platinum
[C]
Silver
[D]
Lead
(19)
During a chemical reaction, atomic number
[A]
Changes
[B]
Changes and then is restored
[C]
Changes alternately
[D]
Remains same
(20)
Which isotope of hydrogen contains only one proton and no neutron in its nucleus?
[A]
Protium
[B]
Deuterium
[C]
Tritium
[D]
None of the above
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