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 number of all the protons and neutrons in a nucleus is known as	A. atomic number B. mass number C. charge number D. none of these
2	According to Rutherford atomic model, the positive charge in an atom	A. is concentrated at its centre B. is in the form of positive electron at same distance from its centre C. is spread uniformly through its volume D. none of these
3	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
4	Maric Curie and Pieree Curie discovered two new radioactive elements, which are called	A. polonium uranium B. uranium and radium C. polonium and radium D. none of these
5	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
6	Neutron was disvovered by:	A. Rutherford in 1920 B. Chadwick in 1922 C. Bohr in 1913 D. Compton in 1927
7	Alfa particles are	A. hydrogen nuclei B. helium nuclei C. electrons D. photons
8	The half life of radioactive substances depends upon	A. amount of substance B. energy of substance C. state of substance D. temperature of substance
9	In radio-active decay, the original element which disintegrate to another element is called	A. element B. daughter element C. parent element D. none of these
10	The most abundant isotope of neon is	A. neon-20 B. neon-21 C. neon-22 D. neon-23

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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

In radio-active decay, the original element which disintegrate to another element is called

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

After alpha decay the atomic number of the atom

Neutron was suggested to be in the nucleus by:

Which of the following material has longer half life

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

In wilson cloud chamber, the air becomes saturated with:

Mass of neutron is

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

Different radioactive material have

The isotope/s of hydrogen is /are:

A curie represents a very strong source of

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

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

The number of isotopes of hydrogen are

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

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

Rate of decay is actually described by.

Neutron was discovered by

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

Radiation detector are used to

The unit of decay constant is

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

The rate of decay of radioactive substance

The half life of radioactive substances depends upon

U-238 present in the natural uranium is about:

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

Proton was discovered by Rutherford in

The half lie of radium-226 is

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ECAT Physics Chapter 21 Important MCQ's

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