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	Proton was discovered by Rutherford in	A. 1915 B. 1906 C. 1910 D. 1920
2	When certain nucleus emits anα particle, its mass number:	A. Increases by one B. Decreases by one C. Remain same D. Decreases by four
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	When a charged particle passes through matter, it produces ionization, this effect is used in	A. fission reaction B. reactor C. radiation detector D. fusion reaction
5	A curie represents a very strong source of	A. α-particle B. β-particle C. γ-particle D. none of these
6	Radioactivity was discovered by	A. Rutherford B. Henri Becqureal C. Maxwell D. James Chadwick
7	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
8	Beta particles are	A. hydrogen nuclei B. helium nuclei C. electrons D. photons
9	Fraction of the decaying atoms per unit time is called	A. decay atom B. decay element C. decay constant D. decay
10	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

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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 reciprocal of decay constant λ of a radioactive material is:

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

In 1932 Chadwick discovered

Mass of proton is of order of

Nucleus consists of

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

When certain nucleus emits anα particle, its mass number:

Which are not the elementary particles?

Nucleon means:

The figure 1.007276μ shows the mass of an:

γ-rays behave like a particle because they explain the

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

Marie curie and Pierre curie discovered:

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

Radium was discovered by:

Which of these is not a radiation detector

1 amu is equal to.

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

Neutron was disvovered by:

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

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

U-238 present in the natural uranium is about:

The half lie of radium-226 is

Mass of neutron is

The unit of decay constant is:

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

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

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

How many isotopes of helium are present?

The half life of uranium-238 is

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ECAT Physics Chapter 21 Important MCQ's

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