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

Fraction of the decaying atoms per unit time is called

Question # 2

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

Question # 3

The rate of decay of radioactive substance

Question # 4

The most abundant isotope of neon is

Question # 5

The half life of uranium-238 is

Question # 6

Neutron was disvovered by:

Question # 7

The chemical properties of all the isotopes of an elements are

Question # 8

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 # 9

The diameter of an atom is of the order

Question # 10

Radioactivity

Question # 11

A pair of quark and antiquark makes a:

Question # 12

The isotope/s of hydrogen is /are:

Question # 13

1 amu is equal to

Question # 14

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

Question # 15

1 amu is equal to.

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
2 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
3 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
4 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
5 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
6 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
7 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
8 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
9 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
10 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year

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