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 primary reaction in a hydrogen bomb?

Fission

Alpha decay

Fusion

2 / 40

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

Uranium-233

Uranium-235

Uranium-238

3 / 40

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

Proton accelerators

Neutron generators

Electron emitters

4 / 40

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

Prevent release of radiation

Store fuel rods

House the turbines

5 / 40

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

Fusion

Alpha decay

Fission

6 / 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

7 / 40

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

Hydrogen

Krypton

Helium

8 / 40

What is a thermonuclear reaction?

A nuclear reaction that occurs at very high temperatures

A nuclear reaction that produces electricity

A nuclear reaction that produces heat

9 / 40

Which type of nuclear reaction is used in atomic bombs?

Fusion

Beta decay

Fission

10 / 40

What is nuclear fission?

Emission of radiation from a nucleus

Splitting of a heavy nucleus into lighter nuclei

Combining of light nuclei to form a heavier nucleus

11 / 40

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

Remove heat

Absorb neutrons

Increase neutron speed

12 / 40

What is a neutron absorber commonly used in nuclear reactors?

Copper

Iron

Boron

13 / 40

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

Fusion

Radioactive decay

Fission

14 / 40

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

Electromagnetic radiation

Electric charge

Energy-mass equivalence

15 / 40

What is a nuclear reaction?

A chemical reaction involving atoms

A process where atomic nuclei are altered

A process where electrons are exchanged

16 / 40

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

Finding suitable fusion materials

Achieving the necessary high temperatures and pressures

Managing radioactive waste

17 / 40

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

Requires lower temperatures

Produces less radioactive waste

Easier to achieve

18 / 40

What is the primary product of a nuclear fusion reaction?

Plutonium

Uranium

Helium

19 / 40

Which type of nuclear reaction powers the sun?

Fusion

Radioactive decay

Fission

20 / 40

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

Electron

Proton

Neutron

21 / 40

What is the primary use of plutonium-239?

Industrial radiography

Fuel in nuclear reactors and weapons

Medical imaging

22 / 40

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

Helium

Hydrogen

Plutonium

23 / 40

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

Decreases

Stays the same

Increases

24 / 40

What element is used in fusion reactions in the sun?

Uranium

Thorium

Hydrogen

25 / 40

What is a breeder reactor designed to do?

Produce more fissile material than it consumes

Operate at lower temperatures

Burn excess fuel

26 / 40

What is released in large quantities during a nuclear reaction?

Oxygen

Carbon dioxide

Energy

27 / 40

What is a common method for enriching uranium?

Distillation

Filtration

Gas centrifugation

28 / 40

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

Release energy

Generate electricity

Absorb neutrons

29 / 40

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

Hydrogen-1

Helium-3

Uranium-235

30 / 40

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

Lead

Uranium

Graphite

31 / 40

What is a chain reaction in nuclear physics?

A non-sustaining reaction sequence

A self-sustaining series of reactions

A single nuclear reaction

32 / 40

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

Uranium-235

Plutonium-239

Deuterium and Tritium

33 / 40

What type of reaction occurs in a supernova explosion?

Beta decay

Fusion

Fission

34 / 40

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

Critical mass

Half-life

Decay constant

35 / 40

What is a common byproduct of nuclear fission?

Hydrogen gas

Radioactive isotopes

Helium gas

36 / 40

Which nuclear reaction process is more difficult to control?

Alpha decay

Fission

Fusion

37 / 40

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

Slow down neutrons

Absorb neutrons

Increase neutron speed

38 / 40

What is the half-life of an isotope?

The time it takes for the isotope to become stable

The time it takes for half of the isotope to decay

The time it takes for all of the isotope to decay

39 / 40

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

Serve as fuel

Provide coolant

Act as a moderator

40 / 40

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

Niels Bohr

Enrico Fermi

Albert Einstein

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