Question # 1

Different radioactive material have

Choose an answer

same half lives

different half lives

same mean lives

same total lives

Nucleus consists of

Choose an answer

proton and neutron

protons and electron

electron and neutron

protons only

Fraction of the decaying atoms per unit time is called

Choose an answer

decay atom

decay element

decay constant

decay

A particle having the mass of electron and charge of a proton is called a

Choose an answer

photon

position

antiproton

antineutrino

Pair production take place when energy ofγ-rays photon is

Choose an answer

equal to 1.02 Mev-

greater than 1.02 Mev

less than 1.02 Mev

none of these

Radium was discovered by:

Choose an answer

Becquerel

Marie curie

Pierre curie

Rutherford

Both (B) and (C)

Marie curie and Pierre curie discovered:

Choose an answer

Uranium

Polonium

Radium

Both (A) and (C)

Plutonium

The missing mass which is converted to energy in the formation of nucleus, is called

Choose an answer

packing fraction

mass defect

binding energy

none of these

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

Choose an answer

element

daughter element

parent element

none of these

Beta particles are

Choose an answer

hydrogen nuclei

helium nuclei

electrons

photons

1 amu is equal to

Choose an answer

1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-34kg

1.66 x 10^-27kg

Radioactivity

Choose an answer

is exhibited more by semiconductors in general

in exhibited more by the element when they are coupled

with other radioactive elements by a covalent bond

is an atomic property of radioactive elements

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Choose an answer

Protactinium

Actinium

Uranium

Radium

Redon

The penetration power ofβ-particle is

Choose an answer

zero

less thanα-particle

equal toα-particle

greater thanα-particle

After alpha decay the atomic number of the atom

Choose an answer

increase by four

decreases by two

increases by two

decrease by four

Proton was discovered by Rutherford in

Choose an answer

1915

1906

1910

1920

γ-rays behave like a particle because they explain the

Choose an answer

Compton effect

Photoelectric effect

Pair-production

all the above

An alpha particle has a charge of

Choose an answer

+2e

-2e

-e

+3e

The chemical behaviour of an atom is determined by

Choose an answer

binding energy

atomic number

mass number

number of isotopes

Rutherford performed an experiment on nuclear reactions in:

Choose an answer

1718 A.D

1818 A.D

1918 A.D

2001 A.D.

1701 A.D.

Binding energy per nucleus is

Choose an answer

greater for heavy nucleus

least for heavy nucleus

greatest for light nuclei

decreases for medium weight niclei

The diameter of an atom is of the order

Choose an answer

10^-125m

10^-11m

10^-10m

10^-9m

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

Choose an answer

Thin mica window

thin glass window

Airy window

Wooden window

None of these

Neutron was discovered in

Choose an answer

1915

1920

1925

1932

Curie is a unit of

Choose an answer

reluctance

resistivity

binding energy

radioactivity

Nucleon means:

Choose an answer

Only electrons

Only neutrons

Only protons

Both (A ) and (C)

Both (B) and (C)

Referring to the above figure, we can say that of all the elements, the most stable element is

Choose an answer

Phosphours

Iron

uranium

Lithium

Bismuth

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

Choose an answer

3 x 10⁸J

9 x 10¹³J

3 x 10¹³J

9 x 10¹⁶J

Radioactivity was discovered by

Choose an answer

Rutherford

Henri Becqureal

Maxwell

James Chadwick

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

Choose an answer

Parent nucleus

Daughter necleus

Mother necleus

Any of these

None of these

More Classes

Other Links

ECAT Pre General Science Physics Chapter 21 Nuclear Physics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer