Question # 1

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Choose an answer

Equal to 1

Less than 1

Greater than 1

Infinity

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

Radium was discovered by:

Choose an answer

Becquerel

Marie curie

Pierre curie

Rutherford

Both (B) and (C)

The rate of decay of radioactive substance

Choose an answer

is constant

decrease exponentially with time

varies inversely as time

decreases linearly with time

The chemical behaviour of an atom is determined by

Choose an answer

binding energy

atomic number

mass number

number of isotopes

When a nucleus emits an alpha particle, it atomic mass decreased by

Choose an answer

2

1

4

3

Which of the following material has longer half life

Choose an answer

radium

polonium

radium

uranium

Neutron was discovered by

Choose an answer

Curie

Roentgen

Chadwick

Rutherford

The number of isotopes of hydrogen are

Choose an answer

2

1

3

4

β-particles are easily deflected by collisions than heavy

Choose an answer

α-particles

β-particles

γ-particles

none of these

The diameter of an atom is of the order

Choose an answer

10^-125m

10^-11m

10^-10m

10^-9m

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

During the nuclear changes, the law/s of conservation that hold/s are that of:

Choose an answer

Charge

energy

Momentum

Mass

All of these

1 amu is equal to.

Choose an answer

1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-24kg

1.66 x 10^-27kg

Nucleus consists of

Choose an answer

proton and neutron

protons and electron

electron and neutron

protons only

After alpha decay the atomic number of the atom

Choose an answer

increase by four

decreases by two

increases by two

decrease by four

Charge on proton is

Choose an answer

1.59 x 10^-9C

1.59 x 10^-7C

-1.59 x 10^-19C

1.59 x 10^-19C

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

Choose an answer

fission reaction

reactor

radiation detector

fusion reaction

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

Choose an answer

9.315 Mev

93.15 Mev

931.5 Mev

2.22 Mev

Radiation detector are used to

Choose an answer

measure intensity of radiation

measure energy of radiation

difference between different types of radiation

all the above

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

Choose an answer

polonium uranium

uranium and radium

polonium and radium

none of these

For Protium, the mass defect is:

Choose an answer

Infinite

Zero

Very large

A few grams

None of these

Mass of neutron is

Choose an answer

1.67 x 10^-31kg

1.67 x 10^-27kg

9.1 x 10^-31kg

1.67 x 10^-19kg

Neutrons are

Choose an answer

positive charge

negatively charged

massless

neutral

Mass of proton is of order of

Choose an answer

10^-31gm

10^-27kg

10^-24gm

10⁺²⁷kg

In wilson cloud chamber, the air becomes saturated with:

Choose an answer

Alcohol vapours

Water

Helium gas

Nitrogen gas

None of these

Charge on neutron is

Choose an answer

1.6 x 10^-19C

zero

-1.6 x 10^-19C

1.2 x 10^-19C

Beta particles are

Choose an answer

hydrogen nuclei

helium nuclei

electrons

photons

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

Choose an answer

A - Z

A

Z

A + Z

A curie represents a very strong source of

Choose an answer

α-particle

β-particle

γ-particle

none of these

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.

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

Choose an answer