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

Phenomenon of radioactivity is due to disintegration of

Question # 2

The number of all the protons and neutrons in a nucleus is known as

Question # 3

Alfa particles are

Question # 4

The number of protons inside a nucleus is called

Question # 5

The figure 1.007276μ shows the mass of an:

Question # 6

Binding energy per nucleus is

Question # 7

A pair of quark and antiquark makes a:

Question # 8

Neutron was discovered by

Question # 9

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

Question # 10

The chemical behaviour of an atom is determined by

Question # 11

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

Question # 12

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

Question # 13

The half life of uranium-238 is

Question # 14

A curie represents a very strong source of

Question # 15

The nucleus left after the emission of some radiation is called:

Question # 16

γ-rays behave like a particle because they explain the

Question # 17

An alpha particle has a charge of

Question # 18

Rutherford performed an experiment on nuclear reactions in:

Question # 19

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

Question # 20

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 21

The total charge of any nucleus is given as

Question # 22

The time required for a radioactive material to decrease in active by one half is called

Question # 23

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 24

The chemical properties of an element depends upon the number of

Question # 25

Nucleon means:

Question # 26

The number if neutrons in the nucleus of 92U235are

Question # 27

Curie is a unit of

Question # 28

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

Question # 29

Nucleus of a hydrogen atom may contain:

Question # 30

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

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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 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
3 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
4 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
5 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
6 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
7 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
8 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
9 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
10 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford

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