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

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

Question # 2

Marie curie and Pierre curie discovered:

Question # 3

1 amu is equal to.

Question # 4

The number of protons inside a nucleus is called

Question # 5

β-particles are easily deflected by collisions than heavy

Question # 6

γ-rays behave like a particle because they explain the

Question # 7

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

Question # 8

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

Question # 9

U-238 present in the natural uranium is about:

Question # 10

Which of these is not a radiation detector

Question # 11

The half life of uranium-238 is

Question # 12

Nucleon means:

Question # 13

γ-rays are

Question # 14

Which are not the elementary particles?

Question # 15

Electrons are

Question # 16

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 17

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 18

The number if neutrons in the nucleus of 92U235are

Question # 19

The rate of decay of radioactive substance

Question # 20

Gamma rays consist of steam of

Question # 21

According to Rutherford atomic model, the positive charge in an atom

Question # 22

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

Question # 23

The amount of energy equivalent to 1 a.m.u is

Question # 24

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

Question # 25

The range ofβ-particle in air is greater than that ofα-particle by

Question # 26

How many isotopes of helium are present?

Question # 27

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 # 28

The rate of decay of a radioactive substance

Question # 29

After alpha decay the atomic number of the atom

Question # 30

Radioactivity was discovered by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
2 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
3 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
4 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
6 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
7 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
8 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
9 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
10 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C

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