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

The half life of uranium-238 is

Question # 2

Nucleon means:

Question # 3

The most abundant isotope of neon is

Question # 4

Three quarks make:

Question # 5

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

Question # 6

Which are not the elementary particles?

Question # 7

β-particles are easily deflected by collisions than heavy

Question # 8

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 9

Which of these is not a radiation detector

Question # 10

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

Question # 11

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 12

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

Question # 13

Nucleus of a hydrogen atom may contain:

Question # 14

Neutron was disvovered by:

Question # 15

Radiation detector are used to

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
2 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
3 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
4 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
5 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
6 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
7 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
8 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
9 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
10 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four

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