ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

00:00
Question # 1

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 2

Radioactivity is

Question # 3

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

Question # 4

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 5

How many isotopes of helium are present?

Question # 6

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

Question # 7

For Protium, the mass defect is:

Question # 8

The chemical behaviour of an atom is determined by

Question # 9

The emission of radiations take place in elements, having charge number greater than

Question # 10

Nucleus of a hydrogen atom may contain:

Question # 11

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

Question # 12

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 13

The total charge of any nucleus is given as

Question # 14

The rate of decay of radioactive substance

Question # 15

In radioactive decay, the new element which is formed due to the disintegration of original element is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
2 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
3 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
4 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
5 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
6 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
7 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
8 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
9 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
10 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000

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