ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

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 energy acquired by a mass of 1g moving with the speed of light is

Question # 2

U-238 present in the natural uranium is about:

Question # 3

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 4

1 amu is equal to

Question # 5

Neutron was discovered by

Question # 6

γ-rays are

Question # 7

The chemical behaviour of an atom is determined by

Question # 8

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

Question # 9

Charge on proton is

Question # 10

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

Question # 11

Electrons are

Question # 12

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 13

Phenomenon of radioactivity is due to disintegration of

Question # 14

The most abundant isotope of neon is

Question # 15

The range of particle depends upon the factor

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
2 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
3 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
4 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
5 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
6 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
7 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
8 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
9 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
10 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time

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