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📘 Chemistry & Chemical Safety – Practice Quize (25 Questions)
1. What is chemistry?
A. The study of energy and light
B. The science of composition, properties, and changes of matter
C. The study of skin, hair, and nails only
D. The practice of mixing beauty products
Answer: B. The science of composition, properties, and changes of matter
2. Which of the following is NOT matter?
A. Water
B. Air
C. Electricity
D. Lotion
Answer: C. Electricity
3. A physical change occurs when:
A. Nail polish solvent evaporates
B. Hair is colored with peroxide
C. Wood burns into ash
D. Iron rusts
Answer: A. Nail polish solvent evaporates
4. A chemical change occurs when:
A. Ice melts
B. Salt dissolves in water
C. Acid and alkaline neutralize to form water
D. Nail polish dries
Answer: C. Acid and alkaline neutralize to form water
5. Which of the following is a physical property?
A. Rusting of iron
B. Burning of wood
C. Color and odor
D. Oxidation of hair color
Answer: C. Color and odor
6. Which of the following is a chemical property?
A. Density of water
B. Boiling point of alcohol
C. Glossiness of a nail polish
D. Ability of hair color to change hair
Answer: D. Ability of hair color to change hair
7. What is the smallest form of chemical matter that cannot be broken down further?
A. Atom
B. Element
C. Compound
D. Molecule
Answer: A. Atom
8. Which mixture is stable and uniform?
A. Emulsion
B. Suspension
C. Solution
D. Oil and water
Answer: C. Solution
9. In a saltwater solution, salt is the:
A. Solvent
B. Solute
C. Emulsion
D. Suspension
Answer: B. Solute
10. Liquids that mix together easily are called:
A. Immiscible
B. Soluble
C. Miscible
D. Insoluble
Answer: C. Miscible
11. When oil and water separate, they are considered:
A. Miscible liquids
B. Immiscible liquids
C. Solvent liquids
D. Solutions
Answer: B. Immiscible liquids
12. A lotion that must be shaken before use is an example of a:
A. Solution
B. Emulsion
C. Suspension
D. Miscible liquid
Answer: C. Suspension
13. What ingredient allows oil and water to mix?
A. Solvent
B. Solute
C. Surfactant
D. Emollient
Answer: C. Surfactant
14. Which statement about emulsions is TRUE?
A. They are stable forever
B. They contain surfactants
C. They have no expiration
D. They cannot be used in cosmetics
Answer: B. They contain surfactants
15. The principle of overexposure means:
A. Any product is safe if labeled “non-toxic”
B. Small repeated exposures may cause sensitivity
C. Large amounts of product are always safe
D. All chemicals are harmless with gloves
Answer: B. Small repeated exposures may cause sensitivity
16. What does “pH” stand for?
A. Percentage of hydrogen
B. Power of hydrogen
C. Potential hydrogen
D. Positive hydrogen
Answer: C. Potential hydrogen
17. Which is TRUE about the pH scale?
A. It ranges from 0 to 7
B. It ranges from 0 to 14
C. Neutral is always alkaline
D. Acidic substances are above 7
Answer: B. It ranges from 0 to 14
18. Hair and skin typically have a pH of:
A. 3
B. 5
C. 7
D. 9
Answer: B. 5
19. Which of the following is an oxidation reaction?
A. Ice melting
B. Rust forming on metal
C. Blending polish colors
D. Water evaporating
Answer: B. Rust forming on metal
20. Combustion is defined as:
A. Slow oxidation without heat
B. Rapid oxidation with heat and light
C. Chemical reaction with no oxygen
D. Physical change in matter
Answer: B. Rapid oxidation with heat and light
21. An exothermic reaction:
A. Absorbs heat
B. Requires an outside heat source
C. Releases heat
D. Does not involve energy
Answer: C. Releases heat
22. What is an example of an endothermic reaction?
A. Polymerization of acrylic
B. Rusting of iron
C. Melting ice
D. Lighting a match
Answer: C. Melting ice
23. Why must incompatible chemicals not be stored together?
A. They may create dangerous reactions
B. They may look similar
C. They lose effectiveness
D. They will evaporate faster
Answer: A. They may create dangerous reactions
24. When mixing chemicals with water, always:
A. Add water to chemical
B. Add chemical to water
C. Mix randomly
D. Add both at once
Answer: B. Add chemical to water
25. Why should beauty professionals study chemistry?
A. To memorize chemical equations
B. To use products effectively and safely
C. To become lab scientists
D. To avoid all chemical services
Answer: B. To use products effectively and safely