Esthetician Practice Exam Esthetician Practice Esthetics Chemistry and Ingredients Questions and Answers 3

Question 1

What is the role of a preservative such as phenoxyethanol in cosmetic formulations?

Accepted Answer

To prevent microbial growth and contamination

Answer

To thicken the product

Answer

To add color to the formula

Answer

To enhance fragrance longevity

Question 2

Which form of retinoid is available over the counter and converts to retinoic acid in the skin?

Accepted Answer

Retinol

Answer

Tretinoin

Answer

Adapalene

Answer

Tazarotene

Question 3

Niacinamide is a form of which B vitamin commonly used to improve skin barrier function?

Accepted Answer

Vitamin B3

Answer

Vitamin B1

Answer

Vitamin B6

Answer

Vitamin B12

Question 4

Which type of ingredient creates an occlusive barrier on the skin surface to prevent moisture loss?

Accepted Answer

Occlusive

Answer

Surfactant

Answer

Humectant

Answer

Emollient

Question 5

What is the main concern when using products with a very low pH, such as professional chemical peels?

Accepted Answer

Chemical burns and skin barrier damage

Answer

Increased sun sensitivity only

Answer

Allergic contact dermatitis

Answer

Product oxidation

Question 6

Which ingredient derived from the chamomile plant is known for its anti-inflammatory and soothing properties?

Accepted Answer

Bisabolol

Answer

Benzoyl peroxide

Answer

Kojic acid

Answer

Sulfur