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	Heavy water is made of one oxygen atom and two atoms of:	A. Protium B. Deuterium C. Tritium D. Any of these
3	For Protium, the mass defect is:	A. Infinite B. Zero C. Very large D. A few grams
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	When a nucleus emits an alpha particle, it atomic mass decreased by	A. 2 B. 1 C. 4 D. 3
6	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
7	Pair production take place when energy ofγ-rays photon is	A. equal to 1.02 Mev- B. greater than 1.02 Mev C. less than 1.02 Mev D. none of these
8	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
9	During the nuclear changes, the law/s of conservation that hold/s are that of:	A. Charge B. energy C. Momentum D. Mass
10	Radioactivity was discovered by:	A. Becquerel B. Marie curie C. Pierre curie D. All of them

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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

Fraction of the decaying atoms per unit time is called

Nucleus consists of

A pair of quark and antiquark makes a:

Radioactivity was discovered by

The penetration power ofβ-particle is

Rutherford performed an experiment on nuclear reactions in:

The counter, which also provides the power to the G.M. tube is called:

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

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

Neon gas have three isotopes whose atomic numbers are

Neutron was disvovered by:

The nucleus/nuclei of hydrogen is/are:

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

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

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

The most abundant isotope of neon is

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

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

The half lie of radium-226 is

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

Structure of the nucleus was explained by

When certain nucleus emits anα particle, its mass number:

The nucleus left after the emission of some radiation is called:

For Protium, the mass defect is:

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

The rate of decay of radioactive substance

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

Mass of proton is of order of

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

The chemical properties of all the isotopes of an elements are

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ECAT Physics Chapter 21 Important MCQ's

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