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

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

Question # 2

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

Question # 3

Radiation detector are used to

Question # 4

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 5

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

Question # 6

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

Question # 7

Mass of proton is

Question # 8

Radioactivity

Question # 9

γ-rays behave like a particle because they explain the

Question # 10

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 # 11

Beta particles are

Question # 12

Rate of decay is actually described by.

Question # 13

The most abundant isotope of neon is

Question # 14

Neutron was disvovered by:

Question # 15

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

Question # 16

The unit of decay constant is:

Question # 17

Nucleon means:

Question # 18

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

Question # 19

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

Question # 20

Rutherford performed an experiment on nuclear reactions in:

Question # 21

The number if neutrons in the nucleus of 92U235are

Question # 22

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

Question # 23

The energy is found from Einstein's mass energy relation is called

Question # 24

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

Question # 25

Mass of proton is of order of

Question # 26

A mass spectrograph sort out

Question # 27

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

Question # 28

Radioactivity was discovered by

Question # 29

Binding energy per nucleus is

Question # 30

Mass of neutron is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
2 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
3 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
4 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
5 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
6 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
7 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
8 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
9 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
10 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves

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