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

Neutrons are

Question # 2

Structure of the nucleus was explained by

Question # 3

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

Question # 4

Gamma rays consist of steam of

Question # 5

Fraction of the decaying atoms per unit time is called

Question # 6

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

Question # 7

Charge on neutron is

Question # 8

The diameter of an atom is of the order

Question # 9

The total charge of any nucleus is given as

Question # 10

Different radioactive material have

Question # 11

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

Question # 12

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 13

Radioactivity was discovered by:

Question # 14

Nucleus consists of

Question # 15

The rate of decay of a radioactive substance

Question # 16

The unit of decay constant is

Question # 17

Nucleon means:

Question # 18

Binding energy per nucleus is

Question # 19

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

Question # 20

Pair production take place when energy ofγ-rays photon is

Question # 21

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

Question # 22

A particle having the mass of electron and charge of a proton is called a

Question # 23

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

Question # 24

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 25

Marie curie and Pierre curie discovered:

Question # 26

For Protium, the mass defect is:

Question # 27

A mass spectrograph sort out

Question # 28

Rate of decay is actually described by.

Question # 29

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

Question # 30

The chemical properties of all the isotopes of an elements are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
2 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
3 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
4 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
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 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
7 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
8 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
9 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
10 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200

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