Nuclear Fission & Fusion - MCQs

What is nuclear fission?

• The joining of two atomic nuclei to form a larger nucleus

• The splitting of a large atomic nucleus into smaller nuclei, releasing energy

• The emission of a neutron from an unstable nucleus

• The conversion of a neutron into a proton

Which of the following is an example of a fuel used in nuclear fission?

• Hydrogen-2

• Uranium-235

• Helium-4

• Carbon-12

In a nuclear reactor, what is the purpose of the control rods?

• To increase the number of neutrons in the reactor

• To absorb neutrons and control the rate of the reaction

• To reflect neutrons back into the core

• To generate the heat needed for electricity production

What is nuclear fusion?

• The process of an atom gaining or losing electrons

• The splitting of a large nucleus into two smaller nuclei

• The joining of two light nuclei to form a heavier nucleus, releasing energy

• The process of converting protons into neutrons

Which of the following conditions is necessary for nuclear fusion to occur?

• Low temperature and high pressure

• High temperature and low pressure

• Low temperature and low pressure

• High temperature and high pressure

6. (Hard) Why does nuclear fusion require such high temperatures?

• To overcome the electrostatic repulsion between nuclei

• To increase the speed of the reaction

• To reduce the energy required for fusion

• To stabilize the fusion process

Which equation, proposed by Einstein, explains why mass is converted into energy in nuclear reactions?

• F = ma

• E = mc²

• V = IR

• P = IV

Why is nuclear fusion considered a potentially better energy source than nuclear fission?

• It produces more energy and has no radioactive waste

• It can occur at room temperature

• It uses readily available uranium as fuel

• It does not require extreme conditions

Which of the following statements about nuclear fission is true?

• A) A single fission reaction releases more energy than a fusion reaction

• B) Fission requires high temperatures to take place

• C) A chain reaction can occur if released neutrons cause further fission events

• D) Fission reactions only occur in stars

Where does nuclear fusion naturally occur?

• In nuclear power stations

• In the Earth's core

• In the Sun and other stars

• In nuclear bombs