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

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Question # 1

Radioactivity was discovered by:

Question # 2

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 3

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 4

Neutron was discovered in

Question # 5

A pair of quark and antiquark makes a:

Question # 6

Fraction of the decaying atoms per unit time is called

Question # 7

An alpha particle has a charge of

Question # 8

The unit of decay constant is:

Question # 9

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

Question # 10

A mass spectrograph sort out

Question # 11

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 12

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

Question # 13

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

Question # 14

The half life of radioactive substances depends upon

Question # 15

Mass of proton is of order of

Question # 16

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 17

There is present in paraffin a large amount of:

Question # 18

Rutherford performed an experiment on nuclear reactions in:

Question # 19

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 # 20

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 21

Marie curie and Pierre curie discovered:

Question # 22

Three quarks make:

Question # 23

The number of isotopes of hydrogen are

Question # 24

Mass of proton is

Question # 25

Neon gas have three isotopes whose atomic numbers are

Question # 26

Binding energy per nucleus is

Question # 27

Which of the following material has longer half life

Question # 28

In wilson cloud chamber, the air becomes saturated with:

Question # 29

Electrons are

Question # 30

Charge on neutron is

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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 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
3 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
4 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
5 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
6 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
7 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
8 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
9 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
10 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams

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