ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

A pair of quark and antiquark makes a:

Question # 2

After alpha decay the atomic number of the atom

Question # 3

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

Question # 4

The isotope/s of hydrogen is /are:

Question # 5

How many isotopes of helium are present?

Question # 6

When a nucleus emits an alpha particles, its charge number decreases by

Question # 7

The half lie of radium-226 is

Question # 8

The half life of radioactive substances depends upon

Question # 9

For Protium, the mass defect is:

Question # 10

An alpha particle has a charge of

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

Electrons are

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
2 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
3 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
4 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
5 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
6 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
7 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
8 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
9 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
10 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

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