An element having large number of __________ is most easily subjected to nuclear fission.

In nuclear fission each neutron that causes fission releases

A

No new neutron

B

At least one new neutron

C

One new neutron

D

More than one new neutron

Critical energy should be __________ the neutron binding energy of the atom in order to initiate a nuclear fission.

A

less than

B

equal to

C

either more or less

D

more than

Energy produced in the nuclear fission is of the order of __________ MeV.

A

20

B

200

C

1000

D

2000

Which of the following undergoes fission reaction easily?

A

U-235

B

U-238

C

Th-232

D

None of these

In nuclear fission

A

The original elements change into completely different elements

B

The electrons of the element change

C

The molecules rearrange themselves to form other molecules

D

None of the above

Which of the following accounts for the maximum energy release in the nuclear fission process?

A

Kinetic energy of fission products

B

Radioactive decay of fission products

C

Instantaneous release of γ-rays

D

Kinetic energy of neutrons

Which statement is not associated with nuclear fission?

A

Neutron-induced nuclear reaction

B

Energy generation in stars

C

Source of energy in nuclear reactor that produces electricity

D

Enormous energy is released in an atom bomb

The phenomenon of nuclear fission is opposite to that of

A

Radioactive decay

B

Thermionic emission

C

Nuclear fusion

D

Combustion

The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is

A

Less

B

More

C

Same

D

Much more

First experimental observation of nuclear fission was done by

A

Plane

B

Rutherford

C

Fermi

D

Hahn and Strassman

An element having large number of __________ is most easily subjected to nuclear fission.

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