[amp_mcq option1=”Slow down neutron” option2=”Absorb neutron” option3=”Increase temperature” option4=”Increase speed of neutron” correct=”option1″]
The correct answer is: A. Slow down neutron.
Heavy water is used in nuclear reactors to slow down neutrons. This is because the slow neutrons are more likely to be captured by the uranium-235 nuclei, which is what causes the nuclear fission reaction.
The other options are incorrect because:
- Option B: Absorb neutron is incorrect because heavy water does not absorb neutrons. In fact, it is used in nuclear reactors to slow down neutrons because it does not absorb them as readily as light water does.
- Option C: Increase temperature is incorrect because heavy water does not increase the temperature of the nuclear reactor. In fact, it can actually help to reduce the temperature of the reactor by absorbing some of the heat that is produced by the nuclear fission reaction.
- Option D: Increase speed of neutron is incorrect because heavy water does not increase the speed of neutrons. In fact, it does the opposite and slows them down.