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	Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called	A. deuterium B. protium C. tritium D. none of these
2	β-particles are easily deflected by collisions than heavy	A. α-particles B. β-particles C. γ-particles D. none of these
3	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
4	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
5	Radioactivity	A. is exhibited more by semiconductors in general B. in exhibited more by the element when they are coupled C. with other radioactive elements by a covalent bond D. is an atomic property of radioactive elements
6	Phenomenon of radioactivity is due to disintegration of	A. nucleus B. neutron C. proton D. molecule
7	When radioactive nucleus emits aβ-particle, the proton-neutron ratio	A. decrease B. increase C. same D. none of these
8	The nucleus/nuclei of hydrogen is/are:	A. Proton B. Deuteron C. Triton D. All of these
9	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
10	The chemical properties of all the isotopes of an elements are	A. same B. different C. slightly different 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

According to Rutherford atomic model, the positive charge in an atom

Which of these is not a radiation detector

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

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

Different radioactive material have

A mass difference of 0.0012 u is equivalent to and energy of:

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

The rate of decay of radioactive substance

When a nucleus emits an alpha particles, its charge number decreases by

The number of protons inside a nucleus is called

The chemical behaviour of an atom is determined by

Pair production take place when energy ofγ-rays photon is

A mass spectrograph sort out

Alfa , beta and gamma rays are emitted from a radio-active substance

There is present in paraffin a large amount of:

Radioactivity was discovered by

An alpha particle has a charge of

Radioactivity is

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

Neutron was discovered by

Neutron was disvovered by:

Structure of the nucleus was explained by

1 amu is equal to

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

Beta particles are

For Protium, the mass defect is:

Rutherford performed an experiment on nuclear reactions in:

γ-rays are

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

The range of particle depends upon the factor

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ECAT Physics Chapter 21 Important MCQ's

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