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 nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains	A. 3 more neutrons B. 3 more electrons C. 3 more protons D. 3 more ions
2	Nucleus of a hydrogen atom may contain:	A. One neutron only B. Two protons and one neutron C. Two protons and two neutrons D. Aany of above
3	Which are not the elementary particles?	A. Photons B. Leptons C. Hadrons D. Quarks
4	Nuclei that have the same charge number but different mass number are called	A. isotones B. isomers C. isotopes D. isobars
5	Radioactivity was discovered by:	A. Becquerel B. Marie curie C. Pierre curie D. All of them
6	Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called	A. deuteron B. deterium C. protium D. tritium
7	The unit of decay constant is:	A. Second B. Metre C. Hour D. Year
8	How many isotopes of helium are present?	A. 1 B. 2 C. 3 D. 4
9	Which of the following material has longer half life	A. radium B. polonium C. radium D. uranium
10	If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be	A. Equal to 1 B. Less than 1 C. Greater than 1 D. Infinity

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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

For Protium, the mass defect is:

Radioactivity

Nucleus of a hydrogen atom may contain:

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Radium was discovered by:

In 1932 Chadwick discovered

The rate of decay of radioactive substance

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

The rate of decay of a radioactive substance

Nucleus consists of

Radioactivity is

The unit of decay constant is:

Neon gas have three isotopes whose atomic numbers are

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

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

An alpha particle has a charge of

The figure 1.007276μ shows the mass of an:

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

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

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

The penetration power ofβ-particle is

Neutron was discovered in

Radioactivity was discovered by

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Neutron was suggested to be in the nucleus by:

The number if neutrons in the nucleus of 92U235are

Pair production take place when energy ofγ-rays photon is

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

Which of the following material has longer half life

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

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ECAT Physics Chapter 21 Important MCQ's

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The number if neutrons in the nucleus of ₉₂U²³⁵are