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

The nucleus/nuclei of hydrogen is/are:

Question # 2

1 amu is equal to

Question # 3

When a nucleus emits an alpha particles, its charge number decreases by

Question # 4

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

Question # 5

After alpha decay the atomic number of the atom

Question # 6

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

Question # 7

U-238 present in the natural uranium is about:

Question # 8

The rate of decay of radioactive substance

Question # 9

Three quarks make:

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

Charge on proton is

Question # 14

The figure 1.007276μ shows the mass of an:

Question # 15

The chemical properties of all the isotopes of an elements are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
2 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
3 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
4 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
5 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
6 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
7 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
8 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
9 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
10 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1

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