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

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Question # 1

Radioactivity was discovered by

Question # 2

β-particles are easily deflected by collisions than heavy

Question # 3

Charge on neutron is

Question # 4

Phenomenon of radioactivity is due to disintegration of

Question # 5

The unit of decay constant is

Question # 6

1 amu is equal to

Question # 7

Beta particles are

Question # 8

In wilson cloud chamber, the air becomes saturated with:

Question # 9

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

Question # 10

The energy is found from Einstein's mass energy relation is called

Question # 11

There is present in paraffin a large amount of:

Question # 12

Marie curie and Pierre curie discovered:

Question # 13

Rate of decay is actually described by.

Question # 14

Neon gas have three isotopes whose atomic numbers are

Question # 15

Nuclei that have the same charge number but different mass number are called

Question # 16

Curie is a unit of

Question # 17

The chemical properties of an element depends upon the number of

Question # 18

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

Question # 19

Alfa particles are

Question # 20

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

Question # 21

The reciprocal of decay constant λ of a radioactive material is:

Question # 22

After alpha decay the atomic number of the atom

Question # 23

Different radioactive material have

Question # 24

A particle having the mass of electron and charge of a proton is called a

Question # 25

Radium was discovered by:

Question # 26

Which of the following material has longer half life

Question # 27

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

Question # 28

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

Question # 29

U-238 present in the natural uranium is about:

Question # 30

The number of isotopes of hydrogen are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
2 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
3 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
4 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
5 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
6 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
7 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
8 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
9 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
10 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these

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