ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

00:00
Question # 1

Structure of the nucleus was explained by

Question # 2

Gamma rays consist of steam of

Question # 3

Rutherford performed an experiment on nuclear reactions in:

Question # 4

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

Question # 5

Neon gas have three isotopes whose atomic numbers are

Question # 6

Nucleon means:

Question # 7

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

Question # 8

The unit of decay constant is:

Question # 9

Radioactivity

Question # 10

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 11

Fraction of the decaying atoms per unit time is called

Question # 12

The nucleus left after the emission of some radiation is called:

Question # 13

The number if neutrons in the nucleus of 92U235are

Question # 14

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

Question # 15

The range of particle depends upon the factor

Question # 16

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

Question # 17

The number of all the protons and neutrons in a nucleus is known as

Question # 18

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

Question # 19

For Protium, the mass defect is:

Question # 20

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

Question # 21

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

Question # 22

The number of protons inside a nucleus is called

Question # 23

The rate of decay of radioactive substance

Question # 24

The half life of radioactive substances depends upon

Question # 25

After alpha decay the atomic number of the atom

Question # 26

Radioactivity was discovered by

Question # 27

Which of the following material has smaller has life

Question # 28

There is present in paraffin a large amount of:

Question # 29

Different radioactive material have

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
2 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
3 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
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 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
6 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
7 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
8 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
9 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
10 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements

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