ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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Question # 1

Nucleon means:

Question # 2

A particle having the mass of electron and charge of a proton is called a

Question # 3

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

Question # 4

Beta particles are

Question # 5

When a nucleus emits an alpha particles, its charge number decreases by

Question # 6

Neutron was suggested to be in the nucleus by:

Question # 7

Radioactivity is

Question # 8

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

Question # 9

1 amu is equal to

Question # 10

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

Question # 11

The reciprocal of decay constant λ of a radioactive material is:

Question # 12

Structure of the nucleus was explained by

Question # 13

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 14

Radioactivity was discovered by

Question # 15

Proton was discovered by Rutherford in

Question # 16

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

Question # 17

The figure 1.007276μ shows the mass of an:

Question # 18

Examples of moderators used in a fission reactor is/are:

Question # 19

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 20

β-particles are easily deflected by collisions than heavy

Question # 21

Nucleus consists of

Question # 22

Which of the following material has longer half life

Question # 23

The unit of decay constant is:

Question # 24

Curie is a unit of

Question # 25

Binding energy per nucleus is

Question # 26

According to Rutherford atomic model, the positive charge in an atom

Question # 27

The counter, which also provides the power to the G.M. tube is called:

Question # 28

Neutron was discovered by

Question # 29

A mass spectrograph sort out

Question # 30

The chemical properties of all the isotopes of an elements are

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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 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
3 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
4 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
5 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
6 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
7 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
8 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
9 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
10 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C

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