Question # 1

Radioactivity is

Choose an answer

self disruptive activity

spontaneous activity

exhibited by all elements under proper conditions

both 'a' and 'b'

The rate of decay of a radioactive substance

Choose an answer

decrease exponentially with time

decreases linearly with time

increases linearly with time

increases exponentially with time

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

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

The distance travelled byα-particle in a medium before coming to rest, is called

Choose an answer

range ofγ-particle

range of neutrons

range of particle

none of these

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

Choose an answer

2

1

4

3

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

Which of the following material has longer half life

Choose an answer

radium

polonium

radium

uranium

The half life of radioactive substances depends upon

Choose an answer

amount of substance

energy of substance

state of substance

temperature of substance

Gamma rays consist of steam of

Choose an answer

electron

proton

photons

all of these

The most abundant isotope of neon is

Choose an answer

neon-20

neon-21

neon-22

neon-23

Heavy water is made of one oxygen atom and two atoms of:

Choose an answer

Protium

Deuterium

Tritium

Any of these

None of these

Which of the following material has smaller has life

Choose an answer

uranium

polonium

radium

radian

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

Choose an answer

atomic number

mass number

charge number

none of these

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

The half life of uranium-238 is

Choose an answer

6.2 x 10⁹years

4.5 x 10⁹days

4.5 x 10⁹years

1.3 x 10⁶years

More Classes

Other Links

Physics ECAT Pre Engineering Chapter 21 Nuclear Physics 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