ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

The unit of decay constant is

Question # 2

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

Question # 3

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 # 4

The total charge of any nucleus is given as

Question # 5

The most abundant isotope of neon is

Question # 6

In wilson cloud chamber, the air becomes saturated with:

Question # 7

When a nucleus emits an alpha particles, its charge number decreases by

Question # 8

The diameter of an atom is of the order

Question # 9

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

Question # 10

Curie is a unit of

Question # 11

Mass of proton is of order of

Question # 12

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

Question # 13

Electrons are

Question # 14

The half life of uranium-238 is

Question # 15

The half lie of radium-226 is

Question # 16

The isotope/s of hydrogen is /are:

Question # 17

Charge on neutron is

Question # 18

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

Question # 19

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 20

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

Question # 21

β-particles are easily deflected by collisions than heavy

Question # 22

When certain nucleus emits anα particle, its mass number:

Question # 23

Three quarks make:

Question # 24

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

Question # 25

A pair of quark and antiquark makes a:

Question # 26

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

Question # 27

Radium was discovered by:

Question # 28

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

Question # 29

The range of particle depends upon the factor

Question # 30

The rate of decay of radioactive substance

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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 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
3 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
4 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
5 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
6 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
7 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
8 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
9 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
10 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze

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