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

Alfa particles are

Question # 2

The isotope/s of hydrogen is /are:

Question # 3

Neutron was disvovered by:

Question # 4

Radioactivity is

Question # 5

Neon gas have three isotopes whose atomic numbers are

Question # 6

When certain nucleus emits anα particle, its mass number:

Question # 7

Gamma rays consist of steam of

Question # 8

γ-rays are

Question # 9

The rate of decay of a radioactive substance

Question # 10

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 11

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

Question # 12

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 13

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

Question # 14

An alpha particle has a charge of

Question # 15

When a nucleus emits an alpha particle, it atomic mass decreased by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
2 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
3 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
4 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
5 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
6 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
7 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
8 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
9 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
10 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

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