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	For an atom having atomic number Z and atomic weight A, the number of electron in an atoms	A. A - Z B. A + Z C. Z D. A
3	Fraction of the decaying atoms per unit time is called	A. decay atom B. decay element C. decay constant D. decay
4	Nucleus consists of	A. proton and neutron B. protons and electron C. electron and neutron D. protons only
5	The chemical behaviour of an atom is determined by	A. binding energy B. atomic number C. mass number D. number of isotopes
6	Neutron was discovered by	A. Curie B. Roentgen C. Chadwick D. Rutherford
7	The number of protons inside a nucleus is called	A. mass number B. atomic weight C. atomic number D. none of these
8	A mass spectrograph sort out	A. molecules B. atoms C. elements D. isotopes
9	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
10	The figure 1.007276μ shows the mass of an:	A. Atom B. Positron C. Electron D. Neutron

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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

Pair production take place when energy ofγ-rays photon is

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

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

γ-rays are

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

The number of protons inside a nucleus is called

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

When certain nucleus emits anα particle, its mass number:

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

Radioactivity was discovered by:

The isotope/s of hydrogen is /are:

The figure 1.007276μ shows the mass of an:

The chemical properties of an element depends upon the number of

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

Neutrons are

Alfa particles are

Phenomenon of radioactivity is due to disintegration of

The half lie of radium-226 is

The half life of radioactive substances depends upon

The penetration power ofβ-particle is

The rate of decay of a radioactive substance

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

Different radioactive material have

Rate of decay is actually described by.

Beta particles are

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

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

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

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

Neutron was discovered in

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ECAT Physics Chapter 21 Important MCQ's

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