ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

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

Question # 2

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

Question # 3

The energy is found from Einstein's mass energy relation is called

Question # 4

Radiation detector are used to

Question # 5

1 amu is equal to.

Question # 6

The half life of radioactive substances depends upon

Question # 7

Charge on neutron is

Question # 8

A pair of quark and antiquark makes a:

Question # 9

γ-rays are

Question # 10

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

Question # 11

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

Question # 12

The number of isotopes of hydrogen are

Question # 13

The half life of uranium-238 is

Question # 14

Neutron was suggested to be in the nucleus by:

Question # 15

The chemical properties of an element depends upon the number of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
2 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
3 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
4 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
5 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
8 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
9 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
10 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these

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