Esthetician Practice Exam Esthetician Practice Cosmetic Chemistry and Ingredients 1

Question 1

Which pH range is considered optimal for most facial cleansers to maintain the skin's acid mantle?

Accepted Answer

pH 4.5–5.5

Answer

pH 6.5–7.5

Answer

pH 8.0–9.0

Answer

pH 2.0–3.0

Question 2

What is the primary purpose of a chelating agent such as EDTA in a cosmetic formulation?

Accepted Answer

To bind and neutralize metal ions that cause rancidity

Answer

To thicken the product texture

Answer

To increase the product's SPF value

Answer

To act as a primary preservative against bacteria

Question 3

Which of the following best describes the function of a surfactant in a facial cleanser?

Accepted Answer

It lowers surface tension to allow oil and water to mix and be rinsed away

Answer

It forms a physical barrier over the skin surface

Answer

It provides antioxidant protection against UV damage

Answer

It increases the viscosity of water-based formulations

Question 4

Retinol belongs to which broader class of cosmetic ingredients?

Accepted Answer

Retinoids (Vitamin A derivatives)

Answer

Alpha hydroxy acids (AHAs)

Answer

Polyphenols

Answer

Ceramides

Question 5

What is the role of niacinamide (Vitamin B3) when used in a skincare formulation?

Accepted Answer

It helps reduce hyperpigmentation and strengthens the skin barrier

Answer

It acts as a physical UV filter by reflecting sunlight

Answer

It exfoliates dead skin cells through enzymatic action

Answer

It functions as an occlusive to seal moisture into the skin

Question 6

In cosmetic chemistry, what does the term 'non-comedogenic' indicate about a product?

Accepted Answer

The product is formulated to not clog pores or promote acne formation

Answer

The product contains no synthetic fragrances

Answer

The product has been tested and is free of allergens

Answer

The product does not contain any chemical preservatives