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

  • Total Questions30

  • Time Allowed30

Start Test Download PDF

ECAT Pre General Science Physics Chapter 21 Nuclear Physics

00:00
Question # 1

Fraction of the decaying atoms per unit time is called

Question # 2

Rutherford performed an experiment on nuclear reactions in:

Question # 3

Structure of the nucleus was explained by

Question # 4

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

Question # 5

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 # 6

In 1932 Chadwick discovered

Question # 7

When certain nucleus emits aβ-particles, is mass number:

Question # 8

When certain nucleus emits anα particle, its mass number:

Question # 9

The most abundant isotope of neon is

Question # 10

The figure 1.007276μ shows the mass of an:

Question # 11

The chemical behaviour of an atom is determined by

Question # 12

Radioactivity

Question # 13

The number if neutrons in the nucleus of 92U235are

Question # 14

The rate of decay of a radioactive substance

Question # 15

γ-rays are

Question # 16

A mass spectrograph sort out

Question # 17

Which of these is not a radiation detector

Question # 18

The half life of radioactive substances depends upon

Question # 19

Mass of proton is

Question # 20

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

Question # 21

Which of the following material has smaller has life

Question # 22

Neon gas have three isotopes whose atomic numbers are

Question # 23

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

Question # 24

Neutron was discovered in

Question # 25

Neutrons are

Question # 26

Radium was discovered by:

Question # 27

1 amu is equal to

Question # 28

There is present in paraffin a large amount of:

Question # 29

Phenomenon of radioactivity is due to disintegration of

Question # 30

The time required for a radioactive material to decrease in active by one half is called

Submit

Prepare Complete Set Wise ECAT Pre General Science Physics Chapter 21 Nuclear Physics MCQs Online With Answers


Topic Test

00:00
Submit

Top Scorers Of ECAT Pre General Science Physics Chapter 21 Nuclear Physics MCQ`s Test

  • L
    LAVANYA 31 - May - 2018 04 Min 45 Sec 110/120
  • U
    Ukasha Rana 29 - Apr - 2022 10 Min 50 Sec 100/120
  • G
    Gorak Danda 24 - Jun - 2024 08 Min 03 Sec 80/120
  • H
    haseeb 12 - Sep - 2021 07 Min 18 Sec 65/120
  • C
    Ch Iftihar 25 - Jan - 2022 07 Min 34 Sec 65/120
  • A
    Aleem Tahir 20 - Apr - 2021 10 Min 50 Sec 65/120
  • H
    Hamza Mukhtair 14 - Jul - 2022 06 Min 35 Sec 50/120
  • I
    ifrah Sheerazi 24 - Jun - 2021 10 Min 50 Sec 50/120
  • U
    umar 12 - Aug - 2021 10 Min 50 Sec 45/120
  • N
    Neha Khan 02 - Dec - 2021 10 Min 50 Sec 40/120
  • F
    Faisal Mehrban 22 - Jun - 2021 10 Min 50 Sec 40/120
  • S
    Sýèd Zàhàd 24 - Jun - 2022 10 Min 50 Sec 30/120
  • S
    Sami Saleem 23 - May - 2023 10 Min 50 Sec 25/120
  • F
    Faraz Ahmad 06 - May - 2021 10 Min 50 Sec 15/120
  • M
    Malik Farhan 23 - May - 2021 07 Min 32 Sec 10/120

ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
2 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
3 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
4 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
5 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
6 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
7 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
8 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
9 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
10 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

Test Questions

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!