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 Protium, the mass defect is:

Question # 2

An alpha particle has a charge of

Question # 3

Alfa particles are

Question # 4

The range of particle depends upon the factor

Question # 5

The number if neutrons in the nucleus of 92U235are

Question # 6

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

Question # 7

The counter, which also provides the power to the G.M. tube is called:

Question # 8

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 9

The rate of decay of a radioactive substance

Question # 10

The chemical properties of all the isotopes of an elements are

Question # 11

The half life of radioactive substances depends upon

Question # 12

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

Question # 13

Which of the following material has smaller has life

Question # 14

According to Rutherford atomic model, the positive charge in an atom

Question # 15

Fraction of the decaying atoms per unit time is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
2 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
3 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
4 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
5 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
6 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
7 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
8 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
9 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
10 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

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