ECAT Physics Chapter 21 Nuclear Physics

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 half life of uranium-238 is

Question # 2

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

Question # 3

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 4

U-238 present in the natural uranium is about:

Question # 5

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 # 6

The chemical behaviour of an atom is determined by

Question # 7

The amount of energy equivalent to 1 a.m.u is

Question # 8

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

Question # 9

Radioactivity is

Question # 10

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

Question # 11

Gamma rays consist of steam of

Question # 12

When certain nucleus emits aβ-particles, is mass number:

Question # 13

Neon gas have three isotopes whose atomic numbers are

Question # 14

Nucleus consists of

Question # 15

Alfa particles are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
2 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
3 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
4 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
5 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
6 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
7 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
8 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
9 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
10 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector

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