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

Nucleus consists of

Question # 2

Radium was discovered by:

Question # 3

Which of the following material has longer half life

Question # 4

γ-rays behave like a particle because they explain the

Question # 5

Neutron was discovered by

Question # 6

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

Question # 7

How much time, theα-particle more massive than an electron

Question # 8

The diameter of an atom is of the order

Question # 9

The number if neutrons in the nucleus of 92U235are

Question # 10

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 11

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

Question # 12

The half life of uranium-238 is

Question # 13

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 14

Radiation detector are used to

Question # 15

The chemical properties of an element depends upon the number of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
2 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
3 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
4 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
5 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
6 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
7 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
8 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
9 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
10 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920

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