Nuclear Reactions MCQs with Answers

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Nuclear Reactions Online Quiz

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• Test Name: Nuclear Reactions MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Nuclear Reactions

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1 / 40

What is the term for the minimum amount of fissile material needed to maintain a chain reaction?

Decay constant

Half-life

Critical mass

2 / 40

What is the main challenge of using nuclear fusion for energy production?

Managing radioactive waste

Finding suitable fusion materials

Achieving the necessary high temperatures and pressures

3 / 40

What is the term for the splitting of a heavy nucleus into two lighter nuclei?

Fission

Fusion

Radioactive decay

4 / 40

What particle is typically used to initiate a nuclear fission reaction?

Proton

Electron

Neutron

5 / 40

What is a nuclear reaction?

A process where electrons are exchanged

A process where atomic nuclei are altered

A chemical reaction involving atoms

6 / 40

What is the primary product of a nuclear fusion reaction?

Plutonium

Helium

Uranium

7 / 40

What is the half-life of an isotope?

The time it takes for the isotope to become stable

The time it takes for all of the isotope to decay

The time it takes for half of the isotope to decay

8 / 40

What is a thermonuclear reaction?

A nuclear reaction that produces heat

A nuclear reaction that occurs at very high temperatures

A nuclear reaction that produces electricity

9 / 40

What is a common byproduct of nuclear fission?

Helium gas

Radioactive isotopes

Hydrogen gas

10 / 40

What does E=mc^2 represent in nuclear physics?

Electric charge

Energy-mass equivalence

Electromagnetic radiation

11 / 40

Which scientist proposed the theory of relativity, which explains the energy release in nuclear reactions?

Enrico Fermi

Albert Einstein

Niels Bohr

12 / 40

What is a chain reaction in nuclear physics?

A non-sustaining reaction sequence

A single nuclear reaction

A self-sustaining series of reactions

13 / 40

What element is used in fusion reactions in the sun?

Thorium

Hydrogen

Uranium

14 / 40

What element is commonly produced during the fission of uranium-235?

Krypton

Hydrogen

Helium

15 / 40

What is a neutron absorber commonly used in nuclear reactors?

Iron

Boron

Copper

16 / 40

Which of the following is a man-made element used in nuclear reactions?

Helium

Hydrogen

Plutonium

17 / 40

What is the purpose of using heavy water in some nuclear reactors?

Serve as fuel

Act as a moderator

Provide coolant

18 / 40

What is the primary reaction in a hydrogen bomb?

Fission

Alpha decay

Fusion

19 / 40

What is the main advantage of nuclear fusion over nuclear fission?

Easier to achieve

Requires lower temperatures

Produces less radioactive waste

20 / 40

What is released in large quantities during a nuclear reaction?

Oxygen

Energy

Carbon dioxide

21 / 40

What type of nuclear reaction is involved in the operation of a hydrogen bomb?

Fission

Alpha decay

Fusion

22 / 40

Which isotope of uranium is used as fuel in most nuclear reactors?

Uranium-238

Uranium-235

Uranium-233

23 / 40

What is nuclear fusion?

Splitting of a heavy nucleus into lighter nuclei

Combining of light nuclei to form a heavier nucleus

Emission of radiation from a nucleus

24 / 40

What is one of the primary sources of neutrons for initiating nuclear reactions?

Electron emitters

Proton accelerators

Neutron generators

25 / 40

Which element is commonly used as fuel in nuclear fission reactors?

Hydrogen-1

Helium-3

Uranium-235

26 / 40

What is a common method for enriching uranium?

Distillation

Filtration

Gas centrifugation

27 / 40

Which type of nuclear reaction is used in atomic bombs?

Fission

Beta decay

Fusion

28 / 40

Which type of nuclear reaction powers the sun?

Fission

Fusion

Radioactive decay

29 / 40

What is the primary purpose of a containment building in a nuclear power plant?

House the turbines

Prevent release of radiation

Store fuel rods

30 / 40

What material is commonly used as a moderator in nuclear reactors?

Graphite

Uranium

Lead

31 / 40

What is the primary use of plutonium-239?

Industrial radiography

Medical imaging

Fuel in nuclear reactors and weapons

32 / 40

In a nuclear reactor, what is the role of the moderator?

Increase neutron speed

Absorb neutrons

Slow down neutrons

33 / 40

What is the role of control rods in a nuclear reactor?

Release energy

Absorb neutrons

Generate electricity

34 / 40

What is a breeder reactor designed to do?

Operate at lower temperatures

Burn excess fuel

Produce more fissile material than it consumes

35 / 40

Which nuclear reaction process is more difficult to control?

Fusion

Alpha decay

Fission

36 / 40

What happens to the mass of nuclei during a nuclear fusion reaction?

Increases

Stays the same

Decreases

37 / 40

What is nuclear fission?

Combining of light nuclei to form a heavier nucleus

Splitting of a heavy nucleus into lighter nuclei

Emission of radiation from a nucleus

38 / 40

What is the main purpose of a coolant in a nuclear reactor?

Absorb neutrons

Increase neutron speed

Remove heat

39 / 40

What type of reaction occurs in a supernova explosion?

Fusion

Beta decay

Fission

40 / 40

What is the most common fuel used in nuclear fusion reactions?

Uranium-235

Deuterium and Tritium

Plutonium-239

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