ECAT Pre General Science Chapter 21 online mcq test with answers for Physics chapter 21 (Nuclear Physics)

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LAVANYA 31 - May - 2018 04 Min 45 Sec 110/120
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Ukasha Rana 29 - Apr - 2022 10 Min 50 Sec 100/120
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Gorak Danda 24 - Jun - 2024 08 Min 03 Sec 80/120
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haseeb 12 - Sep - 2021 07 Min 18 Sec 65/120
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Aleem Tahir 20 - Apr - 2021 10 Min 50 Sec 65/120
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Hamza Mukhtair 14 - Jul - 2022 06 Min 35 Sec 50/120
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ifrah Sheerazi 24 - Jun - 2021 10 Min 50 Sec 50/120
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umar 12 - Aug - 2021 10 Min 50 Sec 45/120
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Neha Khan 02 - Dec - 2021 10 Min 50 Sec 40/120
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Faisal Mehrban 22 - Jun - 2021 10 Min 50 Sec 40/120
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Sýèd Zàhàd 24 - Jun - 2022 10 Min 50 Sec 30/120
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Sami Saleem 23 - May - 2023 10 Min 50 Sec 25/120
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Faraz Ahmad 06 - May - 2021 10 Min 50 Sec 15/120
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Malik Farhan 23 - May - 2021 07 Min 32 Sec 10/120

ECAT Physics Chapter 21 Important MCQ's

Sr.#	Question	Answer
1	When a nucleus emits an alpha particles, its charge number decreases by	A. 3 B. 2 C. 6 D. 5
2	The chemical properties of an element depends upon the number of	A. electron B. position C. photons D. neutrons
3	γ-rays are	A. electrostatic waves B. electromagnetic waves C. heavy particles D. longitudinal waves
4	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
5	The rate of decay of radioactive substance	A. is constant B. decrease exponentially with time C. varies inversely as time D. decreases linearly with time
6	In radio-active decay, the original element which disintegrate to another element is called	A. element B. daughter element C. parent element D. none of these
7	When a nucleus emits an alpha particle, it atomic mass decreased by	A. 2 B. 1 C. 4 D. 3
8	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
9	The energy acquired by a mass of 1g moving with the speed of light is	A. 3 x 10⁸J B. 9 x 10¹³J C. 3 x 10¹³J D. 9 x 10¹⁶J
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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ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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

Radioactivity is

Nucleus consists of

Pair production take place when energy ofγ-rays photon is

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

The half lie of radium-226 is

Radioactivity was discovered by

Phenomenon of radioactivity is due to disintegration of

Nucleon means:

The range ofβ-particle in air is greater than that ofα-particle by

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

How many isotopes of helium are present?

A mass spectrograph sort out

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

Examples of moderators used in a fission reactor is/are:

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

Radioactivity

A curie represents a very strong source of

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

Structure of the nucleus was explained by

In wilson cloud chamber, the air becomes saturated with:

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

The counter, which also provides the power to the G.M. tube is called:

Mass of neutron is

The isotope/s of hydrogen is /are:

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

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

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

Alfa particles are

The chemical properties of all the isotopes of an elements are

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ECAT Physics Chapter 21 Important MCQ's

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