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 reciprocal of decay constant λ of a radioactive material is:	A. Frequency B. Half life C. Year D. Mean life
2	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
3	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
4	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
5	Charge on proton is	A. 1.59 x 10^-9C B. 1.59 x 10^-7C C. -1.59 x 10^-19C D. 1.59 x 10^-19C
6	Neutrons are	A. positive charge B. negatively charged C. massless D. neutral
7	The total charge of any nucleus is given as	A. Ze² B. Z²e C. Z/e D. Ze
8	When certain nucleus emits anα particle, its mass number:	A. Increases by one B. Decreases by one C. Remain same D. Decreases by four
9	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	A. nuclear fission B. nuclear fusion C. man defect D. radioactivity
10	Heavy water is made of one oxygen atom and two atoms of:	A. Protium B. Deuterium C. Tritium D. Any 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

Which are not the elementary particles?

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

How much time, theα-particle more massive than an electron

How many isotopes of helium are present?

Neutron was disvovered by:

Radioactivity is

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

A particle having the mass of electron and charge of a proton is called a

The half life of radioactive substances depends upon

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

When a nucleus emits an alpha particle, it atomic mass decreased by

Three quarks make:

Which of the following material has smaller has life

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

After alpha decay the atomic number of the atom

The unit of decay constant is

The amount of energy equivalent to 1 a.m.u is

The figure 1.007276μ shows the mass of an:

1 amu is equal to

Neutron was discovered by

Charge on neutron is

Neutron was discovered in

In wilson cloud chamber, the air becomes saturated with:

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

When certain nucleus emits aβ-particles, is mass number:

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

There is present in paraffin a large amount of:

Phenomenon of radioactivity is due to disintegration of

Radium was discovered by:

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

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ECAT Physics Chapter 21 Important MCQ's

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