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 range ofβ-particle in air is greater than that ofα-particle by	A. 1000 times B. 100 times C. 15 times D. 10 times
2	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
3	For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is	A. A - Z B. A C. Z D. A + Z
4	The half life of radioactive substances depends upon	A. amount of substance B. energy of substance C. state of substance D. temperature of substance
5	Neutron was discovered in	A. 1915 B. 1920 C. 1925 D. 1932
6	There is present in paraffin a large amount of:	A. Nitrogen B. Hydrogen C. Carbon D. Baryllium
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 half lie of radium-226 is	A. 238 years B. 4.5 x 10⁹days C. 1620 years D. 332 years
9	The most abundant isotope of neon is	A. neon-20 B. neon-21 C. neon-22 D. neon-23
10	When radioactive nucleus emits aβ-particle, the proton-neutron ratio	A. decrease B. increase C. same D. none of these

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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 half life of uranium-238 is

Phenomenon of radioactivity is due to disintegration of

The most abundant isotope of neon is

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

Mass of proton is

Nucleus consists of

Charge on proton is

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

Charge on neutron is

The nuclei of an element having the same charge number but different mass numbers are called:

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

The unit of decay constant is:

The chemical behaviour of an atom is determined by

Three quarks make:

Which are not the elementary particles?

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

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

Binding energy per nucleus is

There is present in paraffin a large amount of:

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

The total charge of any nucleus is given as

Which of the following material has smaller has life

Pair production take place when energy ofγ-rays photon is

After alpha decay the atomic number of the atom

The isotope/s of hydrogen is /are:

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

Neutron was discovered in

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

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

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

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ECAT Physics Chapter 21 Important MCQ's

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