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

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

Question # 2

Radioactivity was discovered by:

Question # 3

In wilson cloud chamber, the air becomes saturated with:

Question # 4

Beta particles are

Question # 5

Alfa particles are

Question # 6

There is present in paraffin a large amount of:

Question # 7

Nucleus of a hydrogen atom may contain:

Question # 8

The unit of decay constant is:

Question # 9

How many isotopes of helium are present?

Question # 10

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 11

Which of the following material has longer half life

Question # 12

Phenomenon of radioactivity is due to disintegration of

Question # 13

The number of protons inside a nucleus is called

Question # 14

Gamma rays consist of steam of

Question # 15

The half lie of radium-226 is

Question # 16

After alpha decay the atomic number of the atom

Question # 17

Charge on neutron is

Question # 18

The penetration power ofβ-particle is

Question # 19

A pair of quark and antiquark makes a:

Question # 20

Rutherford performed an experiment on nuclear reactions in:

Question # 21

The most abundant isotope of neon is

Question # 22

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

Question # 23

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

Question # 24

Electrons are

Question # 25

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 # 26

The reciprocal of decay constant λ of a radioactive material is:

Question # 27

Mass of proton is

Question # 28

The number if neutrons in the nucleus of 92U235are

Question # 29

The isotope/s of hydrogen is /are:

Question # 30

Nucleon means:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
2 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
3 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
4 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
5 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
6 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
7 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
8 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
9 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
10 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A

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