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

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Question # 1

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 2

Nucleus consists of

Question # 3

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

Question # 4

A mass spectrograph sort out

Question # 5

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 6

Rate of decay is actually described by.

Question # 7

Electrons are

Question # 8

The half lie of radium-226 is

Question # 9

The chemical properties of all the isotopes of an elements are

Question # 10

β-particles are easily deflected by collisions than heavy

Question # 11

Nucleon means:

Question # 12

The most abundant isotope of neon is

Question # 13

Charge on neutron is

Question # 14

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

Question # 15

Pair production take place when energy ofγ-rays photon is

Question # 16

Radioactivity

Question # 17

The figure 1.007276μ shows the mass of an:

Question # 18

The nucleus/nuclei of hydrogen is/are:

Question # 19

The total charge of any nucleus is given as

Question # 20

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

Question # 21

The number if neutrons in the nucleus of 92U235are

Question # 22

The rate of decay of radioactive substance

Question # 23

How many isotopes of helium are present?

Question # 24

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

Question # 25

Rutherford performed an experiment on nuclear reactions in:

Question # 26

Neutron was discovered in

Question # 27

Radioactivity is

Question # 28

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

Question # 29

Neutrons are

Question # 30

Curie is a unit of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
2 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
3 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
4 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
5 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
6 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
7 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
8 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
9 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
10 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford

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