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

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

Question # 2

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

Question # 3

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

Question # 4

Fraction of the decaying atoms per unit time is called

Question # 5

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

Question # 6

Charge on proton is

Question # 7

Nucleon means:

Question # 8

Rate of decay is actually described by.

Question # 9

The chemical properties of an element depends upon the number of

Question # 10

The chemical properties of all the isotopes of an elements are

Question # 11

Pair production take place when energy ofγ-rays photon is

Question # 12

Neutron was disvovered by:

Question # 13

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 14

Neutron was discovered in

Question # 15

Radioactivity is

Question # 16

Nucleus of a hydrogen atom may contain:

Question # 17

Mass of proton is

Question # 18

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

Question # 19

γ-rays are

Question # 20

The most abundant isotope of neon is

Question # 21

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

Question # 22

The nucleus/nuclei of hydrogen is/are:

Question # 23

1 amu is equal to.

Question # 24

1 amu is equal to

Question # 25

In radio-active decay, the original element which disintegrate to another element is called

Question # 26

Gamma rays consist of steam of

Question # 27

Which are not the elementary particles?

Question # 28

A mass spectrograph sort out

Question # 29

Alfa particles are

Question # 30

The number if neutrons in the nucleus of 92U235are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
2 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
3 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
4 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
5 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
6 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
7 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
8 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
9 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
10 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)

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