ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

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Question # 1

Curie is a unit of

Question # 2

The most abundant isotope of neon is

Question # 3

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 4

Marie curie and Pierre curie discovered:

Question # 5

Radioactivity was discovered by:

Question # 6

Pair production take place when energy ofγ-rays photon is

Question # 7

The isotope/s of hydrogen is /are:

Question # 8

There is present in paraffin a large amount of:

Question # 9

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

Question # 10

The chemical properties of all the isotopes of an elements are

Question # 11

A pair of quark and antiquark makes a:

Question # 12

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

Question # 13

Rate of decay is actually described by.

Question # 14

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 15

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

Question # 16

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 # 17

When certain nucleus emits anα particle, its mass number:

Question # 18

Radium was discovered by:

Question # 19

Phenomenon of radioactivity is due to disintegration of

Question # 20

For Protium, the mass defect is:

Question # 21

How much time, theα-particle more massive than an electron

Question # 22

Nucleon means:

Question # 23

Radioactivity is

Question # 24

The figure 1.007276μ shows the mass of an:

Question # 25

U-238 present in the natural uranium is about:

Question # 26

The half life of uranium-238 is

Question # 27

Proton was discovered by Rutherford in

Question # 28

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 29

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 30

The number of protons inside a nucleus is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
2 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
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 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
5 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
6 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
7 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
8 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
9 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
10 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives

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