ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

00:00
Question # 1

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

Question # 2

Mass of proton is

Question # 3

Fraction of the decaying atoms per unit time is called

Question # 4

Radioactivity was discovered by:

Question # 5

Neutron was discovered by

Question # 6

A pair of quark and antiquark makes a:

Question # 7

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 8

The chemical behaviour of an atom is determined by

Question # 9

Radioactivity

Question # 10

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 # 11

The penetration power ofβ-particle is

Question # 12

Which of these is not a radiation detector

Question # 13

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

Question # 14

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

Question # 15

Neon gas have three isotopes whose atomic numbers are

Question # 16

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

Question # 17

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

Question # 18

Nucleon means:

Question # 19

How many isotopes of helium are present?

Question # 20

Radium was discovered by:

Question # 21

Structure of the nucleus was explained by

Question # 22

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

Question # 23

Heavy water is made of one oxygen atom and two atoms of:

Question # 24

Mass of neutron is

Question # 25

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

Question # 26

The number of protons inside a nucleus is called

Question # 27

The most abundant isotope of neon is

Question # 28

Rate of decay is actually described by.

Question # 29

The total charge of any nucleus is given as

Question # 30

The figure 1.007276μ shows the mass of an:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
3 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
4 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
5 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
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 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
8 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
9 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
10 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these

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