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	When radioactive nucleus emits aβ-particle, the proton-neutron ratio	A. decrease B. increase C. same D. none of these
2	Radium was discovered by:	A. Becquerel B. Marie curie C. Pierre curie D. Rutherford
3	Fraction of the decaying atoms per unit time is called	A. decay atom B. decay element C. decay constant D. decay
4	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
5	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
6	Referring to the above figure, we can say that of all the elements, the most stable element is	A. Phosphours B. Iron C. uranium D. Lithium
7	Nucleus of a hydrogen atom may contain:	A. One neutron only B. Two protons and one neutron C. Two protons and two neutrons D. Aany of above
8	The total charge of any nucleus is given as	A. Ze² B. Z²e C. Z/e D. Ze
9	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
10	After alpha decay the atomic number of the atom	A. increase by four B. decreases by two C. increases by two D. decrease by four

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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

Heavy water is made of one oxygen atom and two atoms of:

Which of the following material has smaller has life

β-particles are easily deflected by collisions than heavy

Neutron was disvovered by:

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

Radium was discovered by:

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

U-238 present in the natural uranium is about:

A curie represents a very strong source of

The half lie of radium-226 is

Beta particles are

The isotope/s of hydrogen is /are:

Curie is a unit of

Which of these is not a radiation detector

Mass of neutron is

Binding energy per nucleus is

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

A pair of quark and antiquark makes a:

Radioactivity

The range of particle depends upon the factor

Nucleus of a hydrogen atom may contain:

Electrons are

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

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

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

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

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

Three quarks make:

The number if neutrons in the nucleus of 92U235are

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

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ECAT Physics Chapter 21 Important MCQ's

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The number if neutrons in the nucleus of ₉₂U²³⁵are