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

Radioactivity was discovered by

Question # 2

Rate of decay is actually described by.

Question # 3

Mass of proton is

Question # 4

Radium was discovered by:

Question # 5

How much time, theα-particle more massive than an electron

Question # 6

Curie is a unit of

Question # 7

Neutron was disvovered by:

Question # 8

When certain nucleus emits anα particle, its mass number:

Question # 9

Proton was discovered by Rutherford in

Question # 10

Radioactivity is

Question # 11

The most abundant isotope of neon is

Question # 12

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 13

Charge on neutron is

Question # 14

The half lie of radium-226 is

Question # 15

Which of these is not a radiation detector

Question # 16

Nucleon means:

Question # 17

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

Question # 18

1 amu is equal to

Question # 19

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

Question # 20

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

Question # 21

Which of the following material has longer half life

Question # 22

Charge on proton is

Question # 23

The nucleus/nuclei of hydrogen is/are:

Question # 24

Radioactivity was discovered by:

Question # 25

The number of protons inside a nucleus is called

Question # 26

Examples of moderators used in a fission reactor is/are:

Question # 27

The chemical behaviour of an atom is determined by

Question # 28

The diameter of an atom is of the order

Question # 29

Radiation detector are used to

Question # 30

U-238 present in the natural uranium is about:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
2 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
3 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
4 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
5 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
6 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
7 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
8 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
9 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
10 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these

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