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

For Protium, the mass defect is:

Question # 2

In wilson cloud chamber, the air becomes saturated with:

Question # 3

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

Question # 4

Which of the following material has smaller has life

Question # 5

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 6

Neutron was discovered by

Question # 7

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

Question # 8

1 amu is equal to

Question # 9

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

Question # 10

The chemical properties of all the isotopes of an elements are

Question # 11

The energy acquired by a mass of 1g moving with the speed of light is

Question # 12

Proton was discovered by Rutherford in

Question # 13

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 # 14

After alpha decay the atomic number of the atom

Question # 15

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

Question # 16

1 amu is equal to.

Question # 17

Mass of proton is of order of

Question # 18

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

Question # 19

Nucleon means:

Question # 20

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

Question # 21

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

Question # 22

The number of protons inside a nucleus is called

Question # 23

The rate of decay of a radioactive substance

Question # 24

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

Question # 25

The chemical behaviour of an atom is determined by

Question # 26

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

Question # 27

The isotope/s of hydrogen is /are:

Question # 28

γ-rays behave like a particle because they explain the

Question # 29

The half lie of radium-226 is

Question # 30

Radioactivity is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
2 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
3 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
4 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
5 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
6 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
7 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
8 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
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 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg

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