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

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Question # 1

Charge on proton is

Question # 2

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 3

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

Question # 4

Binding energy per nucleus is

Question # 5

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

Question # 6

The figure 1.007276μ shows the mass of an:

Question # 7

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

Question # 8

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

Question # 9

In 1932 Chadwick discovered

Question # 10

When certain nucleus emits anα particle, its mass number:

Question # 11

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 # 12

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

Question # 13

Charge on neutron is

Question # 14

Different radioactive material have

Question # 15

Mass of neutron is

Question # 16

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

Question # 17

β-particles are easily deflected by collisions than heavy

Question # 18

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

Question # 19

Alfa particles are

Question # 20

Neon gas have three isotopes whose atomic numbers are

Question # 21

The number of all the protons and neutrons in a nucleus is known as

Question # 22

A mass spectrograph sort out

Question # 23

The most abundant isotope of neon is

Question # 24

Marie curie and Pierre curie discovered:

Question # 25

Rate of decay is actually described by.

Question # 26

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

Question # 27

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

Question # 28

Neutron was discovered by

Question # 29

Which of the following material has longer half life

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
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 chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
4 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
5 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
6 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
7 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
8 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
9 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
10 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)

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