of Chemistry | Latest Version | 2024/2025
| Rated A+
What does the pH scale measure?
✔✔ Acidity or alkalinity of a substance
What pH level is considered neutral?
✔✔ 7
What type of solution has a pH below 7?
✔✔ Acidic
What type of solution has a pH above 7?
✔✔ Alkaline
What is the natural pH level of hair and skin?
✔✔ 4.5 to 5.5
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, What happens when acids and alkalis are mixed together in equal parts?
✔✔ They neutralize each other.
What is an example of an organic compound commonly found in hair products?
✔✔ Alcohol
What type of chemical reaction releases heat?
✔✔ Exothermic reaction
What type of chemical reaction absorbs heat?
✔✔ Endothermic reaction
What is the main element found in hair?
✔✔ Keratin (a protein)
What term describes the process of breaking down substances using water?
✔✔ Hydrolysis
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