Test Your Chemistry Knowledge with this Chemistry Quiz.
Dive into this chemistry quiz covering essential topics like Atomic Structure, Molecules and Compounds, States of Matter, Chemical Bonding, Reactions, Acids and Bases, Periodic Table, Stoichiometry, Organic Chemistry, and Laboratory Techniques. It’s designed to help you reinforce key concepts, sharpen your understanding, and have fun while learning chemistry.
CHEMISTRY QUIZ – 60 QUESTIONS
ATOMIC STRUCTURE
1. The smallest particle of an element that retains its chemical properties is
A. Electron
B. Atom
C. Molecule
D. Proton
2. The nucleus of an atom contains
A. Electrons only
B. Protons and neutrons
C. Protons and electrons
D. Neutrons only
3. Which particle has a negative charge?
A. Proton
B. Neutron
C. Electron
D. Nucleus
4. The atomic number of an element is the number of
A. Neutrons
B. Protons
C. Electrons
D. Protons and neutrons
5. Isotopes are atoms that have the same number of
A. Protons but different neutrons
B. Neutrons but different protons
C. Electrons but different protons
D. Protons and electrons
MOLECULES AND COMPOUNDS CHEMISTRY QUIZ
6. A molecule is formed when
A. Atoms bond chemically
B. Elements are mixed physically
C. Atoms gain electrons
D. Electrons move freely
7. A compound contains
A. Only one element
B. Two or more elements chemically combined
C. Mixtures of elements
D. Ions only
8. Water (H₂O) is an example of
A. Element
B. Molecule
C. Mixture
D. Salt
9. Molecular formula shows
A. Number of atoms and type of elements in a molecule
B. Only elements present
C. Mass of atoms
D. Type of bond only
10. Ionic compounds are formed between
A. Two metals
B. Metal and non-metal
C. Two non-metals
D. Proton and neutron
STATES OF MATTER CHEMISTRY QUIZ
11. Solids have
A. Fixed shape and volume
B. Fixed volume but no shape
C. No fixed shape or volume
D. Free particles
12. Liquids
A. Have fixed shape
B. Take the shape of container
C. Cannot flow
D. Have no volume
13. Gases
A. Have fixed volume
B. Expand to fill container
C. Have definite shape
D. Cannot be compressed
14. Sublimation is the process where
A. Solid turns to liquid
B. Solid turns to gas directly
C. Gas turns to liquid
D. Liquid turns to solid
15. Evaporation occurs at
A. Boiling point only
B. Surface of liquid at any temperature
C. Freezing point only
D. Solid surface only
CHEMICAL BONDING CHEMISTRY QUIZ
16. Covalent bond is formed by
A. Sharing electrons
B. Transferring electrons
C. Loss of neutrons
D. Exchange of protons
17. Ionic bond involves
A. Sharing electrons
B. Transferring electrons
C. Gaining neutrons
D. Losing neutrons
18. Metallic bonding occurs in
A. Non-metals
B. Metals
C. Gases
D. Liquids
19. Polar covalent bonds
A. Have unequal sharing of electrons
B. Have equal sharing
C. Form only in metals
D. Form ions
20. Hydrogen bonding is
A. Weak attraction between hydrogen and electronegative atom
B. Strong covalent bond
C. Ionic bond
D. Metallic bond
CHEMICAL REACTIONS CHEMISTRY QUIZ
21. A chemical reaction involves
A. Physical mixing
B. Change in chemical composition
C. Change of state only
D. Dissolving only
22. Reactants are
A. Substances formed after reaction
B. Substances present before reaction
C. Products of reaction
D. Catalysts
23. Products are
A. Same as reactants
B. Substances formed after reaction
C. Mixtures
D. Elements only
24. Combustion is
A. Reaction with oxygen producing heat and light
B. Reaction with acid
C. Reaction with water
D. Reaction producing salts
25. Neutralization is a reaction between
A. Acid and base
B. Metal and acid
C. Metal and water
D. Non-metal and base
ACIDS, BASES, AND SALTS
26. pH < 7 indicates
A. Acidic solution
B. Neutral solution
C. Basic solution
D. Salt solution
27. pH = 7 indicates
A. Acid
B. Neutral
C. Base
D. Salt
28. pH > 7 indicates
A. Acid
B. Base
C. Neutral
D. Salt
29. Common acid is
A. NaOH
B. HCl
C. NaCl
D. H₂O
30. Common base is
A. HCl
B. NaOH
C. H₂SO₄
D. NH₄Cl
PERIODIC TABLE CHEMISTRY QUIZ
31. Atomic number indicates
A. Number of protons
B. Number of neutrons
C. Number of electrons only
D. Mass of element
32. Elements in the same group
A. Have same atomic number
B. Have similar chemical properties
C. Are metals only
D. Are gases only
33. Periods in periodic table are
A. Vertical columns
B. Horizontal rows
C. Groups of metals
D. Groups of non-metals
34. Alkali metals are found in
A. Group 1
B. Group 2
C. Group 17
D. Group 18
35. Noble gases are
A. Very reactive
B. Chemically inert
C. Metals
D. Acids
STOICHIOMETRY
36. Mole concept is used to
A. Measure mass
B. Measure number of particles
C. Measure volume
D. Measure density
37. 1 mole of any substance contains
A. 6.02 × 10²³ particles
B. 1 × 10²³ particles
C. 6.02 × 10²⁰ particles
D. 1 × 10²⁰ particles
38. Avogadro’s number is
A. 6.02 × 10²³
B. 3 × 10²³
C. 1 × 10²³
D. 6 × 10²⁰
39. Relative molecular mass is
A. Sum of relative atomic masses
B. Average mass of electron
C. Mass of nucleus only
D. Mass of proton only
40. Mass of 1 mole of H₂O is
A. 18 g
B. 16 g
C. 2 g
D. 20 g
ORGANIC CHEMISTRY
41. Organic compounds contain
A. Carbon and hydrogen
B. Only hydrogen
C. Only oxygen
D. Metals only
42. Methane formula is
A. CH₄
B. C₂H₆
C. C₃H₈
D. C₄H₁₀
43. Alcohol functional group is
A. –COOH
B. –OH
C. –NH₂
D. –Cl
44. Ethanol is used in
A. Fuel
B. Solvent
C. Beverage
D. All of the above
45. Alkanes are
A. Saturated hydrocarbons
B. Unsaturated hydrocarbons
C. Aromatic compounds
D. Alcohols
LABORATORY TECHNIQUES
46. A balance measures
A. Volume
B. Mass
C. Temperature
D. Density
47. A thermometer measures
A. Temperature
B. Mass
C. Volume
D. Force
48. Filtration is used to
A. Separate soluble substances
B. Separate insoluble solids from liquids
C. Measure pH
D. Determine mass
49. Distillation separates
A. Mixture of solids
B. Mixture of liquids based on boiling points
C. Acids and bases
D. Metals
50. Evaporation removes
A. Solute
B. Solvent
C. Solids only
D. None
ELECTROCHEMISTRY
51. Electrolysis involves
A. Chemical reaction without electricity
B. Decomposition of substances using electricity
C. Reaction with heat only
D. Reaction with acids only
52. Anode is the electrode where
A. Oxidation occurs
B. Reduction occurs
C. No reaction occurs
D. Current stops
53. Cathode is the electrode where
A. Reduction occurs
B. Oxidation occurs
C. Gas forms
D. No reaction occurs
54. Electrolytes conduct electricity because they
A. Contain ions
B. Are metals
C. Are pure water
D. Contain electrons only
55. Galvanization protects metal by
A. Coating with zinc
B. Heating
C. Polishing
D. Painting only
ENVIRONMENTAL CHEMISTRY / POLLUTION
56. Acid rain is caused by
A. CO₂ and O₂
B. SO₂ and NO₂
C. H₂ and O₂
D. N₂ only
57. Greenhouse effect is due to
A. CFCs
B. CO₂, CH₄, and water vapor
C. O₂ only
D. H₂ only
58. Biodegradable substances
A. Break down naturally
B. Do not decay
C. Are metals
D. Are acids only
59. Ozone layer protects from
A. Infrared radiation
B. UV radiation
C. X-rays
D. Gamma rays
60. Water pollution can be caused by
A. Industrial waste
B. Agricultural chemicals
C. Domestic sewage
D. All of the above
CHEMISTRY QUIZ ANSWERS AND EXPLANATIONS
1. B – Atom is the smallest unit of an element that retains chemical properties.
2. B – Nucleus contains protons and neutrons.
3. C – Electrons have negative charge.
4. B – Atomic number = number of protons.
5. A – Isotopes have same protons but different neutrons.
6. A – Molecule is formed when atoms bond chemically.
7. B – Compound = 2+ elements chemically combined.
8. B – Water is a molecule.
9. A – Molecular formula shows number and type of atoms.
10. B – Ionic compounds form between metal and non-metal.
11. A – Solids have fixed shape and volume.
12. B – Liquids take shape of container.
13. B – Gases expand to fill container.
14. B – Sublimation = solid → gas.
15. B – Evaporation occurs at surface at any temperature.
16. A – Covalent bond = sharing electrons.
17. B – Ionic bond = transfer of electrons.
18. B – Metallic bonding occurs in metals.
19. A – Polar covalent bonds = unequal sharing.
20. A – Hydrogen bonding = weak attraction.
21. B – Chemical reaction = change in composition.
22. B – Reactants = substances present before reaction.
23. B – Products = substances formed after reaction.
24. A – Combustion = reaction with oxygen producing heat and light.
25. A – Neutralization = acid + base → salt + water.
26. A – pH < 7 → acidic solution.
27. B – pH 7 → neutral.
28. B – pH > 7 → basic.
29. B – HCl is common acid.
30. B – NaOH is common base.
31. A – Atomic number = number of protons.
32. B – Elements in same group have similar chemical properties.
33. B – Periods = horizontal rows.
34. A – Alkali metals = group 1.
35. B – Noble gases are chemically inert.
36. B – Mole concept measures number of particles.
37. A – 1 mole = 6.02 × 10²³ particles.
38. A – Avogadro’s number = 6.02 × 10²³.
39. A – Relative molecular mass = sum of relative atomic masses.
40. A – Mass of 1 mole H₂O = 18 g.
41. A – Organic compounds contain carbon and hydrogen.
42. A – Methane = CH₄.
43. B – Alcohol group = –OH.
44. D – Ethanol used in fuel, solvent, beverages.
45. A – Alkanes are saturated hydrocarbons.
46. B – Balance measures mass.
47. A – Thermometer measures temperature.
48. B – Filtration separates insoluble solids from liquids.
49. B – Distillation separates liquids by boiling point.
50. B – Evaporation removes solvent.
51. B – Electrolysis decomposes substances with electricity.
52. A – Anode = oxidation.
53. A – Cathode = reduction.
54. A – Electrolytes conduct because of ions.
55. A – Galvanization protects metal with zinc.
56. B – Acid rain = SO₂, NO₂.
57. B – Greenhouse gases = CO₂, CH₄, H₂O vapor.
58. A – Biodegradable substances decay naturally.
59. B – Ozone layer protects from UV rays.
60. D – Water pollution caused by industrial, agricultural, and domestic waste.
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