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	According to Rutherford atomic model, the positive charge in an atom	A. is concentrated at its centre B. is in the form of positive electron at same distance from its centre C. is spread uniformly through its volume D. none of these
2	Rutherford performed an experiment on nuclear reactions in:	A. 1718 A.D B. 1818 A.D C. 1918 A.D D. 2001 A.D.
3	Structure of the nucleus was explained by	A. J.J Thomson B. Bohr C. Millikan D. Rutherford
4	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
5	Radioactivity	A. is exhibited more by semiconductors in general B. in exhibited more by the element when they are coupled C. with other radioactive elements by a covalent bond D. is an atomic property of radioactive elements
6	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
7	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
8	During the nuclear changes, the law/s of conservation that hold/s are that of:	A. Charge B. energy C. Momentum D. Mass
9	Which of the following material has longer half life	A. radium B. polonium C. radium D. uranium
10	Neutron was suggested to be in the nucleus by:	A. Rutherford in 1920 B. Bohar in 1913 C. Dirac in 1928 D. Anderson in 1932

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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

1 amu is equal to

Radioactivity was discovered by:

Radium was discovered by:

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

The range of particle depends upon the factor

For Protium, the mass defect is:

Phenomenon of radioactivity is due to disintegration of

Which of the following material has longer half life

Neutrons are

Neutron was suggested to be in the nucleus by:

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

The chemical properties of all the isotopes of an elements are

After alpha decay the atomic number of the atom

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

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

Radioactivity is

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

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

The number of protons inside a nucleus is called

Electrons are

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

Neutron was discovered in

When certain nucleus emits anα particle, its mass number:

Marie curie and Pierre curie discovered:

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

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

Pair production take place when energy ofγ-rays photon is

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

Nucleon means:

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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