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

The figure 1.007276μ shows the mass of an:

Question # 2

Mass of proton is

Question # 3

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

Question # 4

Which of the following material has longer half life

Question # 5

Charge on neutron is

Question # 6

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

Question # 7

The nucleus/nuclei of hydrogen is/are:

Question # 8

Neutron was disvovered by:

Question # 9

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

Question # 10

Proton was discovered by Rutherford in

Question # 11

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

Question # 12

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

Question # 13

In 1932 Chadwick discovered

Question # 14

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 # 15

Different radioactive material have

Question # 16

1 amu is equal to

Question # 17

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 18

Radioactivity was discovered by:

Question # 19

A curie represents a very strong source of

Question # 20

Phenomenon of radioactivity is due to disintegration of

Question # 21

A pair of quark and antiquark makes a:

Question # 22

Radioactivity

Question # 23

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 24

The half life of uranium-238 is

Question # 25

A particle having the mass of electron and charge of a proton is called a

Question # 26

The number of protons inside a nucleus is called

Question # 27

Alfa particles are

Question # 28

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

Question # 29

The unit of decay constant is:

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
2 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
3 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
4 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
5 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
6 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
7 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
8 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
9 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
10 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these

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