Nuclear Science

Question 1 :

Which of the following is used as a moderator in nuclear reactor?

A). Thorium
B). Graphite
C). Radium
D). Ordinary water
Answer : Option B

Question 2 :

Which among the following is a positively charged particle emitted by a radioactive element?

A). Beta ray
B). Alpha ray
C). Cathode ray
D). Gamma ray
Answer : Option B

Question 3 :

Atoms are composed of

A). electrons and protons
B). electrons only
C). protons only
D). electrons and nuclei
Answer : Option D

Question 4 :

In an atomic explosion, enormous energy is released which is due to

A). conversion of chemical energy into heat energy
B). conversion of mechanical energy into nuclear energy
C). conversion of mass into energy
D). conversion of neutrons into protons
Answer : Option C

Question 5 :

Isotopes are separated by

A). crystallisation
B). sublimation
C). distillation
D). filtration
Answer : Option C