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

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ECAT Physics Chapter 21 Important MCQ's

Sr.#	Question	Answer
1	Rutherford performed an experiment on nuclear reactions in:	A. 1718 A.D B. 1818 A.D C. 1918 A.D D. 2001 A.D.
2	Radium was discovered by:	A. Becquerel B. Marie curie C. Pierre curie D. Rutherford
3	Binding energy per nucleus is	A. greater for heavy nucleus B. least for heavy nucleus C. greatest for light nuclei D. decreases for medium weight niclei
4	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
5	For Protium, the mass defect is:	A. Infinite B. Zero C. Very large D. A few grams
6	The chemical properties of all the isotopes of an elements are	A. same B. different C. slightly different D. none of these
7	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
8	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
9	The nucleus left after the emission of some radiation is called:	A. Parent nucleus B. Daughter necleus C. Mother necleus D. Any of these
10	When thorium nucleus emits aβ-particle, the daughter nucleus is called:	A. Protactinium B. Actinium C. Uranium D. Radium

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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

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

Which of these is not a radiation detector

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

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

Alfa particles are

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

The rate of decay of a radioactive substance

Mass of proton is

When a nucleus emits an alpha particle, it atomic mass decreased by

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

After alpha decay the atomic number of the atom

The energy acquired by a mass of 1g moving with the speed of light is

Fraction of the decaying atoms per unit time is called

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

The number of isotopes of hydrogen are

A pair of quark and antiquark makes a:

The unit of decay constant is:

Radium was discovered by:

Gamma rays consist of steam of

Phenomenon of radioactivity is due to disintegration of

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

According to Rutherford atomic model, the positive charge in an atom

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

Electrons are

Mass of neutron is

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

The rate of decay of radioactive substance

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

γ-rays behave like a particle because they explain the

When a charged particle passes through matter, it produces ionization, this effect is used in

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ECAT Physics Chapter 21 Important MCQ's

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