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

A curie represents a very strong source of

Question # 2

Marie curie and Pierre curie discovered:

Question # 3

Electrons are

Question # 4

The amount of energy equivalent to 1 a.m.u is

Question # 5

When a nucleus emits an alpha particles, its charge number decreases by

Question # 6

Neutron was discovered by

Question # 7

The emission of radiations take place in elements, having charge number greater than

Question # 8

γ-rays are

Question # 9

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 # 10

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

Question # 11

The half life of uranium-238 is

Question # 12

After alpha decay the atomic number of the atom

Question # 13

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

Question # 14

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 15

Alfa particles are

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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 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 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
4 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
5 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
6 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
7 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
8 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
9 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
10 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

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