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 nuclei of an element having the same charge number but different mass numbers are called:	A. Isobars B. Isotopes C. Isomers D. Isobaric
2	The chemical properties of all the isotopes of an elements are	A. same B. different C. slightly different D. none of these
3	For an atom having atomic number Z and atomic weight A, the charge on the nucleus is	A. A - Z B. A + Z C. Z D. A
4	The nucleus/nuclei of hydrogen is/are:	A. Proton B. Deuteron C. Triton D. All of these
5	The emission of radiations take place in elements, having charge number greater than	A. 109 B. 82 C. 69 D. 52
6	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
7	The number if neutrons in the nucleus of ₉₂U²³⁵are	A. Infinite B. 92 C. 235 D. 143
8	If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by	A. -4 B. 4 C. 2 D. 1
9	A mass spectrograph sort out	A. molecules B. atoms C. elements D. isotopes
10	Marie curie and Pierre curie discovered:	A. Uranium B. Polonium C. Radium D. Both (A) and (C)

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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

Neutron was discovered in

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

Curie is a unit of

Proton was discovered by Rutherford in

In wilson cloud chamber, the air becomes saturated with:

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

Rutherford performed an experiment on nuclear reactions in:

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

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

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

Neon gas have three isotopes whose atomic numbers are

The nucleus/nuclei of hydrogen is/are:

Pair production take place when energy ofγ-rays photon is

Marie curie and Pierre curie discovered:

1 amu is equal to.

Which of these is not a radiation detector

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

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

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

How many isotopes of helium are present?

A pair of quark and antiquark makes a:

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

The number of all the protons and neutrons in a nucleus is known as

U-238 present in the natural uranium is about:

Nucleus of a hydrogen atom may contain:

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

Radioactivity is

The unit of decay constant is

After alpha decay the atomic number of the atom

γ-rays behave like a particle because they explain the

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ECAT Physics Chapter 21 Important MCQ's

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