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	Rate of decay is actually described by.	A. Half line B. Decay constant C. Mean life D. Total life
2	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
3	Beta particles are	A. hydrogen nuclei B. helium nuclei C. electrons D. photons
4	Radium was discovered by:	A. Becquerel B. Marie curie C. Pierre curie D. Rutherford
5	Alfa particles are	A. hydrogen nuclei B. helium nuclei C. electrons D. photons
6	The distance travelled byα-particle in a medium before coming to rest, is called	A. range ofγ-particle B. range of neutrons C. range of particle D. none of these
7	Neutron was disvovered by:	A. Rutherford in 1920 B. Chadwick in 1922 C. Bohr in 1913 D. Compton in 1927
8	Charge on neutron is	A. 1.6 x 10^-19C B. zero C. -1.6 x 10^-19C D. 1.2 x 10^-19C
9	How many isotopes of helium are present?	A. 1 B. 2 C. 3 D. 4
10	Neutron was discovered by	A. Curie B. Roentgen C. Chadwick D. Rutherford

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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

A mass difference of 0.0012 u is equivalent to and energy of:

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

Neutron was disvovered by:

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

The chemical behaviour of an atom is determined by

1 amu is equal to

An alpha particle has a charge of

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

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

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 number of protons inside a nucleus is called

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

The half lie of radium-226 is

The chemical properties of an element depends upon the number of

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

Radioactivity was discovered by

Gamma rays consist of steam of

A pair of quark and antiquark makes a:

The time required for a radioactive material to decrease in active by one half is called

There is present in paraffin a large amount of:

The rate of decay of radioactive substance

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

Referring to the above figure, we can say that of all the elements, the most stable element is

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

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

Mass of neutron is

1 amu is equal to.

γ-rays are

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

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ECAT Physics Chapter 21 Important MCQ's

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