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	Alfa particles are	A. hydrogen nuclei B. helium nuclei C. electrons D. photons
2	γ-rays behave like a particle because they explain the	A. Compton effect B. Photoelectric effect C. Pair-production D. all the above
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	Neon gas have three isotopes whose atomic numbers are	A. 20, 24 , 23 B. 20, 21 , 22 C. 20, 19 , 21 D. none of these
5	Structure of the nucleus was explained by	A. J.J Thomson B. Bohr C. Millikan D. Rutherford
6	Mass of proton is	A. 1.67 x 10^-27kg B. 1.67 x 10^-31kg C. 1.66 x 10^-34kg D. 1.67 x 10^-17kg
7	The penetration power ofβ-particle is	A. zero B. less thanα-particle C. equal toα-particle D. greater thanα-particle
8	The nucleus left after the emission of some radiation is called:	A. Parent nucleus B. Daughter necleus C. Mother necleus D. Any of these
9	U-238 present in the natural uranium is about:	A. 59% B. 0.007% C. 99% D. 39%
10	During the nuclear changes, the law/s of conservation that hold/s are that of:	A. Charge B. energy C. Momentum D. Mass

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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

Alfa particles are

Radioactivity was discovered by:

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

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

The unit of decay constant is:

When a charged particle passes through matter, it produces ionization, this effect is used in

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

In radioactive decay, the new element which is formed due to the disintegration of original element is called

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

The half life of radioactive substances depends upon

Radiation detector are used to

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

Proton was discovered by Rutherford in

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

Charge on neutron is

The chemical properties of all the isotopes of an elements are

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

Three quarks make:

A mass spectrograph sort out

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

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

Neutron was discovered by

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

Radioactivity

The chemical properties of an element depends upon the number of

The total charge of any nucleus is given as

Which of the following material has smaller has life

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

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Rate of decay is actually described by.

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ECAT Physics Chapter 21 Important MCQ's

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