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

00:00
Question # 1

Charge on neutron is

Question # 2

Curie is a unit of

Question # 3

Radioactivity is

Question # 4

The chemical properties of an element depends upon the number of

Question # 5

For Protium, the mass defect is:

Question # 6

The range of particle depends upon the factor

Question # 7

Mass of proton is

Question # 8

Nucleon means:

Question # 9

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

Question # 10

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

Question # 11

Fraction of the decaying atoms per unit time is called

Question # 12

Neutron was discovered by

Question # 13

β-particles are easily deflected by collisions than heavy

Question # 14

Structure of the nucleus was explained by

Question # 15

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

Question # 16

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 17

The penetration power ofβ-particle is

Question # 18

The nucleus/nuclei of hydrogen is/are:

Question # 19

When certain nucleus emits anα particle, its mass number:

Question # 20

Radioactivity was discovered by

Question # 21

Beta particles are

Question # 22

Gamma rays consist of steam of

Question # 23

The amount of energy equivalent to 1 a.m.u is

Question # 24

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

Question # 25

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 26

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 27

Rate of decay is actually described by.

Question # 28

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

Question # 29

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
4 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
5 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
6 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
7 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
8 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
9 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
10 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)

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