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

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

Question # 2

Marie curie and Pierre curie discovered:

Question # 3

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

Question # 4

Mass of proton is of order of

Question # 5

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 # 6

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

Question # 7

Neon gas have three isotopes whose atomic numbers are

Question # 8

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

Question # 9

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

Question # 10

The number of isotopes of hydrogen are

Question # 11

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

Question # 12

Charge on proton is

Question # 13

Beta particles are

Question # 14

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

Question # 15

There is present in paraffin a large amount of:

Question # 16

Three quarks make:

Question # 17

The half life of uranium-238 is

Question # 18

The number of protons inside a nucleus is called

Question # 19

Mass of neutron is

Question # 20

A mass spectrograph sort out

Question # 21

The penetration power ofβ-particle is

Question # 22

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 23

The most abundant isotope of neon is

Question # 24

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

Question # 25

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

Question # 26

A pair of quark and antiquark makes a:

Question # 27

The emission of radiations take place in elements, having charge number greater than

Question # 28

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 29

After alpha decay the atomic number of the atom

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
2 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
3 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
4 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
5 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
6 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
7 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
8 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
9 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
10 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

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