Quantum Chromodynamics MCQs with Answers

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Quantum Chromodynamics Online Quiz

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• Test Name: Quantum Chromodynamics MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Quantum Chromodynamics

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1 / 40

What are the two types of hadrons?

Leptons and bosons

Baryons and mesons

Fermions and bosons

2 / 40

What is a characteristic feature of gluons in QCD?

Lack of mass

Carrying electric charge

Self-interaction

3 / 40

What does QCD predict about the interaction between quarks at very high energies?

Asymptotic freedom

Neutralization

Confinement

4 / 40

Which quark flavor changes in beta decay, a process mediated by the weak force?

Top quark

Down quark

Strange quark

5 / 40

What is the theoretical framework used to describe the interactions of quarks and gluons?

Quantum Chromodynamics

Electrodynamics

Quantum Gravity

6 / 40

What is the force carrier of the strong interaction in QCD?

Gluon

Photon

Graviton

7 / 40

Which particle decay process involves the strong interaction?

Neutron decay

Beta decay

Proton decay

8 / 40

What is the term for the increasing strength of the strong force at short distances?

Color force

Asymptotic freedom

Confinement

9 / 40

What role do Feynman diagrams play in QCD?

Define particle spin

Represent particle interactions

Measure particle masses

10 / 40

What is the main evidence for quark confinement?

Free quarks detected

Gluons directly observed

No free quarks observed

11 / 40

What is the property of quarks that relates to their interaction via the strong force?

Electric charge

Spin

Color charge

12 / 40

Which of the following is a meson?

Pion

Neutron

Proton

13 / 40

In QCD, what is the term for a pair of quark and antiquark bound together?

Meson

Baryon

Lepton

14 / 40

What is the term for the breaking of the QCD vacuum symmetry?

Gravitational symmetry breaking

Chiral symmetry breaking

Electroweak symmetry breaking

15 / 40

Which particles are affected by the strong force?

Photons and gravitons

Electrons and neutrinos

Quarks and gluons

16 / 40

What property do gluons carry that allows them to interact with each other?

Electric charge

Color charge

Mass

17 / 40

How many colors of quarks are there in QCD?

2

3

6

18 / 40

What is the process called where a quark and an antiquark pair is created from the vacuum?

Annihilation

Fusion

Pair production

19 / 40

Which concept explains why quarks behave as free particles at high energies?

Asymptotic freedom

Confinement

Symmetry breaking

20 / 40

What experimental evidence supports the existence of quarks?

Double-slit experiment

Photoelectric effect

Deep inelastic scattering

21 / 40

What is the quantum number that describes a quark's color charge?

Color

Flavor

Spin

22 / 40

Which quark is the heaviest?

Charm quark

Bottom quark

Top quark

23 / 40

What is the QCD term for a force-carrying particle?

Fermion

Scalar boson

Gauge boson

24 / 40

What is the term for the mathematical framework that QCD is based on?

String theory

Gauge theory

General relativity

25 / 40

What principle prohibits quarks of the same color and flavor from occupying the same quantum state?

Pauli exclusion principle

Heisenberg uncertainty principle

Bohr quantization rule

26 / 40

What is the phenomenon called where quarks are never found in isolation?

Quark confinement

Color neutrality

Asymptotic freedom

27 / 40

Which property is conserved in all strong interactions?

Weak charge

Electric charge

Color charge

28 / 40

In QCD, quarks are always found in groups called what?

Bosons

Hadrons

Leptons

29 / 40

What is the lowest energy state of a quantum system in QCD called?

Ground state

Virtual state

Excited state

30 / 40

What is the effect of the strong force within nucleons on nuclear structure?

Creating atomic orbitals

Binding nucleons together

Repelling nucleons

31 / 40

In QCD, what is the term for a bound state of three quarks?

Meson

Lepton

Baryon

32 / 40

Which type of symmetry is fundamental in QCD?

SU(3) symmetry

SU(2) symmetry

U(1) symmetry

33 / 40

Which phenomenon is not explained by QCD?

Quark confinement

Hadron mass spectrum

Electromagnetic interaction

34 / 40

What does the "Q" in QCD stand for?

Quality

Quantum

Quark

35 / 40

What is the potential energy behavior between two quarks as the distance between them increases?

Remains constant

Increases

Decreases

36 / 40

What is the name given to the hypothetical particles that mediate the strong force in QCD?

W bosons

Gluons

Z bosons

37 / 40

Which term refers to the group of symmetries including translations, rotations, and internal symmetries in QCD?

Lorentz symmetry

Translational symmetry

Gauge symmetry

38 / 40

What is the QCD prediction for the high-energy limit of the strong coupling constant?

It remains constant

It decreases

It increases

39 / 40

How many types of gluons are there in QCD?

3

8

6

40 / 40

Which concept describes how the color force becomes stronger as quarks move apart?

Asymptotic freedom

Confinement

Color charge

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