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 rate of decay of a radioactive substance	A. decrease exponentially with time B. decreases linearly with time C. increases linearly with time D. increases exponentially with time
2	Which are not the elementary particles?	A. Photons B. Leptons C. Hadrons D. Quarks
3	Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called	A. deuteron B. deterium C. protium D. tritium
4	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
5	The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains	A. 3 more neutrons B. 3 more electrons C. 3 more protons D. 3 more ions
6	Which of the following material has smaller has life	A. uranium B. polonium C. radium D. radian
7	The range of particle depends upon the factor	A. charge, mass and energy of particle B. density of medium C. ionization potential of the atoms D. all the above
8	The total charge of any nucleus is given as	A. Ze² B. Z²e C. Z/e D. Ze
9	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
10	Different radioactive material have	A. same half lives B. different half lives C. same mean lives D. same total lives

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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 chemical behaviour of an atom is determined by

Neutrons are

Three quarks make:

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

The half life of radioactive substances depends upon

The rate of decay of a radioactive substance

A curie represents a very strong source of

The unit of decay constant is

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

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

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

Radiation detector are used to

Which of these is not a radiation detector

Nucleus of a hydrogen atom may contain:

Neutron was discovered in

The nucleus/nuclei of hydrogen is/are:

Electrons are

The isotope/s of hydrogen is /are:

There is present in paraffin a large amount of:

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

A pair of quark and antiquark makes a:

Radioactivity was discovered by:

Which of the following material has longer half life

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

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

Neutron was discovered by

γ-rays are

The chemical properties of an element depends upon the number of

Radioactivity was discovered by

1 amu is equal to.

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ECAT Physics Chapter 21 Important MCQ's

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