ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Question # 1

In wilson cloud chamber, the air becomes saturated with:

Question # 2

Neutron was discovered by

Question # 3

After alpha decay the atomic number of the atom

Question # 4

The penetration power ofβ-particle is

Question # 5

In radio-active decay, the original element which disintegrate to another element is called

Question # 6

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

Question # 7

Which of these is not a radiation detector

Question # 8

Heavy water is made of one oxygen atom and two atoms of:

Question # 9

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 10

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 11

The chemical properties of all the isotopes of an elements are

Question # 12

Nucleus of a hydrogen atom may contain:

Question # 13

The nucleus left after the emission of some radiation is called:

Question # 14

Different radioactive material have

Question # 15

A pair of quark and antiquark makes a:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
2 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
3 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
4 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
5 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
6 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
7 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
8 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
9 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
10 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A

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