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 missing mass which is converted to energy in the formation of nucleus, is called

Question # 2

Neutron was discovered by

Question # 3

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

Question # 4

The most abundant isotope of neon is

Question # 5

γ-rays behave like a particle because they explain the

Question # 6

There is present in paraffin a large amount of:

Question # 7

Marie curie and Pierre curie discovered:

Question # 8

The chemical properties of all the isotopes of an elements are

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

A mass spectrograph sort out

Question # 14

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

Question # 15

The diameter of an atom is of the order

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
2 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
3 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
4 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
5 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
6 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
7 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
8 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
9 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
10 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life

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