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	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
3	The rate of decay of radioactive substance	A. is constant B. decrease exponentially with time C. varies inversely as time D. decreases linearly with time
4	A curie represents a very strong source of	A. α-particle B. β-particle C. γ-particle D. none of these
5	Radium was discovered by:	A. Becquerel B. Marie curie C. Pierre curie D. Rutherford
6	In radioactive decay, the new element which is formed due to the disintegration of original element is called	A. element B. daughter element C. parent element D. none of these
7	Different radioactive material have	A. same half lives B. different half lives C. same mean lives D. same total lives
8	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
9	The figure 1.007276μ shows the mass of an:	A. Atom B. Positron C. Electron D. Neutron
10	When radioactive nucleus emits aβ-particle, the proton-neutron ratio	A. decrease B. increase C. same 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

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

The rate of decay of radioactive substance

Nucleus consists of

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

A curie represents a very strong source of

The penetration power ofβ-particle is

Gamma rays consist of steam of

The range of particle depends upon the factor

Electrons are

Structure of the nucleus was explained by

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

Proton was discovered by Rutherford in

The figure 1.007276μ shows the mass of an:

Radioactivity

The number of protons inside a nucleus is called

The nucleus/nuclei of hydrogen is/are:

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

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

In wilson cloud chamber, the air becomes saturated with:

The number of isotopes of hydrogen are

Nucleus of a hydrogen atom may contain:

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

The most abundant isotope of neon is

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

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

The total charge of any nucleus is given as

There is present in paraffin a large amount of:

Phenomenon of radioactivity is due to disintegration of

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

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

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ECAT Physics Chapter 21 Important MCQ's

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