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 isotope/s of hydrogen is /are:	A. Protium B. Deuterium C. Tritium D. Both (A) and (B)
2	The counter, which also provides the power to the G.M. tube is called:	A. Thin mica window B. thin glass window C. Airy window D. Wooden window
3	Radioactivity is	A. self disruptive activity B. spontaneous activity C. exhibited by all elements under proper conditions D. both 'a' and 'b'
4	In 1932 Chadwick discovered	A. proton B. neutron C. photon D. electron
5	Proton was discovered by Rutherford in	A. 1915 B. 1906 C. 1910 D. 1920
6	The half lie of radium-226 is	A. 238 years B. 4.5 x 10⁹days C. 1620 years D. 332 years
7	Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called	A. deuterium B. protium C. tritium D. none of these
8	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
9	Which of the following material has longer half life	A. radium B. polonium C. radium D. uranium
10	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

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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 rate of decay of radioactive substance

Mass of neutron is

The half lie of radium-226 is

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

The unit of decay constant is

Rutherford performed an experiment on nuclear reactions in:

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

How many isotopes of helium are present?

Which of the following material has longer half life

Charge on neutron is

Pair production take place when energy ofγ-rays photon is

A pair of quark and antiquark makes a:

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

Radiation detector are used to

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

There is present in paraffin a large amount of:

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

Alfa , beta and gamma rays are emitted from a radio-active substance

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

Neon gas have three isotopes whose atomic numbers are

The unit of decay constant is:

The most abundant isotope of neon is

When certain nucleus emits anα particle, its mass number:

Mass of proton is

Charge on proton is

A curie represents a very strong source of

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

Rate of decay is actually described by.

Alfa particles are

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

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ECAT Physics Chapter 21 Important MCQ's

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