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	The missing mass which is converted to energy in the formation of nucleus, is called	A. packing fraction B. mass defect C. binding energy D. none of these
2	Neutron was discovered by	A. Curie B. Roentgen C. Chadwick D. Rutherford
3	The number of protons inside a nucleus is called	A. mass number B. atomic weight C. atomic number D. none of these
4	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
5	The penetration power ofβ-particle is	A. zero B. less thanα-particle C. equal toα-particle D. greater thanα-particle
6	Rutherford performed an experiment on nuclear reactions in:	A. 1718 A.D B. 1818 A.D C. 1918 A.D D. 2001 A.D.
7	U-238 present in the natural uranium is about:	A. 59% B. 0.007% C. 99% D. 39%
8	The emission of radiations take place in elements, having charge number greater than	A. 109 B. 82 C. 69 D. 52
9	When certain nucleus emits aβ-particles, is mass number:	A. Remain same B. Increases by one C. Decreases by one D. Decreases by four
10	The time required for a radioactive material to decrease in active by one half is called	A. half time B. half life C. disintegration time D. mean life

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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

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

When certain nucleus emits aβ-particles, is mass number:

Fraction of the decaying atoms per unit time is called

A curie represents a very strong source of

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

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

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

The unit of decay constant is:

Curie is a unit of

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

Phenomenon of radioactivity is due to disintegration of

Which of the following material has smaller has life

The chemical properties of all the isotopes of an elements are

Beta particles are

Structure of the nucleus was explained by

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

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

The range of particle depends upon the factor

The isotope/s of hydrogen is /are:

Which of the following material has longer half life

Electrons are

The figure 1.007276μ shows the mass of an:

β-particles are easily deflected by collisions than heavy

Neutron was disvovered by:

Charge on proton is

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

γ-rays behave like a particle because they explain the

In 1932 Chadwick discovered

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

The number of protons inside a nucleus is called

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ECAT Physics Chapter 21 Important MCQ's

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