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 total charge of any nucleus is given as

Question # 2

Nucleus consists of

Question # 3

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

Question # 4

1 amu is equal to

Question # 5

The half lie of radium-226 is

Question # 6

Nuclei that have the same charge number but different mass number are called

Question # 7

Which are not the elementary particles?

Question # 8

In radio-active decay, the original element which disintegrate to another element is called

Question # 9

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

Question # 10

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 11

The chemical behaviour of an atom is determined by

Question # 12

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

Question # 13

Rate of decay is actually described by.

Question # 14

Neutron was discovered by

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 20

Radium was discovered by:

Question # 21

For Protium, the mass defect is:

Question # 22

Binding energy per nucleus is

Question # 23

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

Question # 24

Charge on neutron is

Question # 25

An alpha particle has a charge of

Question # 26

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 27

Neutron was discovered in

Question # 28

The nucleus/nuclei of hydrogen is/are:

Question # 29

The figure 1.007276μ shows the mass of an:

Question # 30

Radioactivity was discovered by:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
2 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
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 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
5 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
6 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
7 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
8 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
9 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
10 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)

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