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

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

Question # 2

The energy is found from Einstein's mass energy relation is called

Question # 3

The figure 1.007276μ shows the mass of an:

Question # 4

A pair of quark and antiquark makes a:

Question # 5

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

Question # 6

Radioactivity

Question # 7

When certain nucleus emits anα particle, its mass number:

Question # 8

β-particles are easily deflected by collisions than heavy

Question # 9

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 10

Radioactivity was discovered by

Question # 11

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

Question # 12

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

Question # 13

Charge on neutron is

Question # 14

Fraction of the decaying atoms per unit time is called

Question # 15

The range of particle depends upon the factor

Question # 16

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 # 17

Radiation detector are used to

Question # 18

Neutron was discovered by

Question # 19

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

Question # 20

In wilson cloud chamber, the air becomes saturated with:

Question # 21

The half life of uranium-238 is

Question # 22

The number of isotopes of hydrogen are

Question # 23

Radium was discovered by:

Question # 24

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

Question # 25

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 26

The total charge of any nucleus is given as

Question # 27

Curie is a unit of

Question # 28

The unit of decay constant is:

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
2 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
3 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
4 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
5 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
6 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
7 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
8 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
9 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
10 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above

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