ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Question # 1

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

Question # 2

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

Question # 3

1 amu is equal to

Question # 4

Beta particles are

Question # 5

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

Question # 6

The unit of decay constant is

Question # 7

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

Question # 8

The diameter of an atom is of the order

Question # 9

The number of isotopes of hydrogen are

Question # 10

Rate of decay is actually described by.

Question # 11

The chemical properties of all the isotopes of an elements are

Question # 12

Heavy water is made of one oxygen atom and two atoms of:

Question # 13

The rate of decay of a radioactive substance

Question # 14

Radiation detector are used to

Question # 15

The half life of uranium-238 is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
2 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
3 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
4 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
5 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
6 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
7 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
8 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
9 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
10 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

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