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 half life of uranium-238 is

Question # 2

Charge on neutron is

Question # 3

Mass of neutron is

Question # 4

The chemical properties of an element depends upon the number of

Question # 5

The energy acquired by a mass of 1g moving with the speed of light is

Question # 6

Radioactivity was discovered by

Question # 7

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 8

Electrons are

Question # 9

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

Question # 10

Radium was discovered by:

Question # 11

Rate of decay is actually described by.

Question # 12

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

Question # 13

The most abundant isotope of neon is

Question # 14

A mass spectrograph sort out

Question # 15

How many isotopes of helium are present?

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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 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
3 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
4 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
5 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
6 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
7 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
8 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
9 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
10 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m

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