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

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Question # 1

Radium was discovered by:

Question # 2

Which of the following material has longer half life

Question # 3

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

Question # 4

Charge on neutron 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

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

Question # 7

Neutron was disvovered by:

Question # 8

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

Question # 9

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

Question # 10

Radioactivity is

Question # 11

The range of particle depends upon the factor

Question # 12

Binding energy per nucleus is

Question # 13

The rate of decay of radioactive substance

Question # 14

Radioactivity

Question # 15

γ-rays are

Question # 16

How much time, theα-particle more massive than an electron

Question # 17

The unit of decay constant is:

Question # 18

The isotope/s of hydrogen is /are:

Question # 19

Alfa particles are

Question # 20

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

Question # 21

The chemical behaviour of an atom is determined by

Question # 22

Charge on proton is

Question # 23

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 24

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 # 25

Neutron was discovered by

Question # 26

The penetration power ofβ-particle is

Question # 27

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

Question # 28

Rate of decay is actually described by.

Question # 29

The number of all the protons and neutrons in a nucleus is known as

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
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 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
4 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
5 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
6 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
7 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
8 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
9 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
10 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

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