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

Marie curie and Pierre curie discovered:

Question # 2

An alpha particle has a charge of

Question # 3

Nucleus of a hydrogen atom may contain:

Question # 4

Fraction of the decaying atoms per unit time is called

Question # 5

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

Question # 6

Radioactivity was discovered by:

Question # 7

The unit of decay constant is

Question # 8

Neutron was discovered in

Question # 9

The figure 1.007276μ shows the mass of an:

Question # 10

In 1932 Chadwick discovered

Question # 11

The reciprocal of decay constant λ of a radioactive material is:

Question # 12

Nucleon means:

Question # 13

The half life of radioactive substances depends upon

Question # 14

γ-rays are

Question # 15

Radioactivity was discovered by

Question # 16

Radium was discovered by:

Question # 17

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

Question # 18

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

Question # 19

Curie is a unit of

Question # 20

Three quarks make:

Question # 21

The chemical behaviour of an atom is determined by

Question # 22

The diameter of an atom is of the order

Question # 23

The unit of decay constant is:

Question # 24

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 # 25

The nucleus/nuclei of hydrogen is/are:

Question # 26

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

Question # 27

Charge on neutron is

Question # 28

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

Question # 29

β-particles are easily deflected by collisions than heavy

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
2 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
3 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
4 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
5 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
6 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
7 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
8 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
9 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
10 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg

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