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Disulfide bonds
Connect this concept to client safety, service outcome, and the manufacturer’s directions.
Focused cosmetology lesson
Chemical Services Practice Test
Prepare for permanent waving, chemical relaxing, bond changes, and chemical-service safety.
Jump to practice →Lesson ready ✓
Study modeUnderstand → Recall → Apply
Learning objective
Know the decision, not only the definition
By the end of this lesson, you should be able to recognize the safest and most technically correct choice in a chemical services scenario.
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Key ideas
Your chemical services study checklist
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Permanent waving
Connect this concept to client safety, service outcome, and the manufacturer’s directions.
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Hydroxide and thio relaxers
Connect this concept to client safety, service outcome, and the manufacturer’s directions.
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Test curls and strand evaluation
Connect this concept to client safety, service outcome, and the manufacturer’s directions.
Exam rule
Safety and scope break the tie
When two answers seem possible, prefer the choice that protects the client, follows the product label, and stays inside a cosmetologist’s scope.
Common trap
Technically possible is not always permitted
The exam often contrasts a familiar salon habit with the safest compliant procedure. Read every qualifier before choosing.
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Use your current state bulletin. It controls the final topic weight, state-specific rules, exam provider, and practical requirements.
Apply the lesson
Check your chemical services recall
The feedback explains the rule immediately so even a missed answer becomes useful.
Ready when you areChemical Services practice questions
No account · Instant feedback
3 original questions with instant answers and plain-English explanations.
Exam ruleTopic scoreReview mode
Chemical Services questions and explained answers
These original educational questions are the same concepts used in the short practice above. They are not questions copied from a licensing exam.
01A product with a pH below 7 is considered+
Answer: acidic.
The pH scale places acids below 7, neutral solutions at 7, and alkaline solutions above 7.
02Which bond is broken by water or heat and reforms as hair dries or cools?+
Answer: Hydrogen bond.
Hydrogen bonds are weak physical side bonds. Water and heat break them temporarily, which is why wet sets and thermal styling can reshape hair.
03A relaxer retouch should be applied to+
Answer: new growth only.
Overlap can severely weaken the hair. A retouch is placed on new growth while protecting previously relaxed lengths.
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