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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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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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	The chemical behaviour of an atom is determined by	A. binding energy B. atomic number C. mass number D. number of isotopes
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	When radioactive nucleus emits aβ-particle, the proton-neutron ratio	A. decrease B. increase C. same D. none of these
4	How many isotopes of helium are present?	A. 1 B. 2 C. 3 D. 4
5	Neutron was discovered in	A. 1915 B. 1920 C. 1925 D. 1932
6	In radioactive decay, the new element which is formed due to the disintegration of original element is called	A. element B. daughter element C. parent element D. none of these
7	The energy is found from Einstein's mass energy relation is called	A. binding energy of electron B. binding energy of proton C. binding energy of neutron D. binding energy of nucleus
8	Mass of proton is of order of	A. 10^-31gm B. 10^-27kg C. 10^-24gm D. 10⁺²⁷kg
9	The range ofβ-particle in air is greater than that ofα-particle by	A. 1000 times B. 100 times C. 15 times D. 10 times
10	Electrons are	A. positive charged B. negatively charged C. massless D. neutral

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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

A mass spectrograph sort out

The number of isotopes of hydrogen are

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

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

The diameter of an atom is of the order

Alfa particles are

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

Phenomenon of radioactivity is due to disintegration of

The figure 1.007276μ shows the mass of an:

Neon gas have three isotopes whose atomic numbers are

A particle having the mass of electron and charge of a proton is called a

Nucleon means:

Different radioactive material have

Nucleus consists of

Mass of neutron is

1 amu is equal to.

Radioactivity is

The half life of radioactive substances depends upon

The half life of uranium-238 is

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

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

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

Marie curie and Pierre curie discovered:

The most abundant isotope of neon is

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

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

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

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

The number of all the protons and neutrons in a nucleus is known as

The unit of decay constant is:

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ECAT Physics Chapter 21 Important MCQ's

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