ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 2

The number of all the protons and neutrons in a nucleus is known as

Question # 3

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 4

The figure 1.007276μ shows the mass of an:

Question # 5

The energy is found from Einstein's mass energy relation is called

Question # 6

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 7

The half life of uranium-238 is

Question # 8

When certain nucleus emits aβ-particles, is mass number:

Question # 9

β-particles are easily deflected by collisions than heavy

Question # 10

A pair of quark and antiquark makes a:

Question # 11

The emission of radiations take place in elements, having charge number greater than

Question # 12

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 13

For Protium, the mass defect is:

Question # 14

Phenomenon of radioactivity is due to disintegration of

Question # 15

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
2 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
3 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
4 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
5 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
8 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
9 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
10 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these

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