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

Which of the following material has longer half life

Question # 2

Fraction of the decaying atoms per unit time is called

Question # 3

The chemical properties of an element depends upon the number of

Question # 4

Radioactivity is

Question # 5

Rutherford performed an experiment on nuclear reactions in:

Question # 6

Nucleus consists of

Question # 7

The number if neutrons in the nucleus of 92U235are

Question # 8

The half life of radioactive substances depends upon

Question # 9

The rate of decay of radioactive substance

Question # 10

Neutron was disvovered by:

Question # 11

For Protium, the mass defect is:

Question # 12

Rate of decay is actually described by.

Question # 13

Structure of the nucleus was explained by

Question # 14

Mass of proton is of order of

Question # 15

The rate of decay of a radioactive substance

Question # 16

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

Question # 17

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

The nucleus/nuclei of hydrogen is/are:

Question # 24

Binding energy per nucleus is

Question # 25

Nucleon means:

Question # 26

A mass spectrograph sort out

Question # 27

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

Question # 28

The unit of decay constant is:

Question # 29

Which of the following material has smaller has life

Question # 30

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

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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 number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
2 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
3 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
4 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
5 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
6 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
7 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
8 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
9 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
10 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

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