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

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 2

For Protium, the mass defect is:

Question # 3

The diameter of an atom is of the order

Question # 4

The half life of radioactive substances depends upon

Question # 5

The range of particle depends upon the factor

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

Which of the following material has smaller has life

Question # 10

Electrons are

Question # 11

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

Question # 12

Neutron was discovered in

Question # 13

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

Question # 14

Three quarks make:

Question # 15

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

Question # 16

Radiation detector are used to

Question # 17

Rate of decay is actually described by.

Question # 18

Nuclei that have the same charge number but different mass number are called

Question # 19

Which of these is not a radiation detector

Question # 20

Neutrons are

Question # 21

The isotope/s of hydrogen is /are:

Question # 22

The nucleus/nuclei of hydrogen is/are:

Question # 23

Marie curie and Pierre curie discovered:

Question # 24

The range ofβ-particle in air is greater than that ofα-particle by

Question # 25

Different radioactive material have

Question # 26

Alfa particles are

Question # 27

1 amu is equal to

Question # 28

The number if neutrons in the nucleus of 92U235are

Question # 29

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

Question # 30

There is present in paraffin a large amount of:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
2 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
3 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
4 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
5 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
6 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
7 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
8 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
9 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
10 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg

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