Cleansing and care needs (face, lips, scalp, body) MCQs With Answer

Cleansing and care needs (face, lips, scalp, body) MCQs With Answer

This quiz set is designed specifically for M.Pharm students studying Cosmetics & Cosmeceuticals (MPH 204T). It covers the scientific principles, formulation choices, and clinical considerations behind modern cleansing and care products for face, lips, scalp, and body. Questions emphasize surfactant classes, pH and barrier interactions, rinse‑off versus leave‑on systems, mildness and irritation testing, functional excipients (humectants, emollients, occlusives), and targeted actives for conditions such as dandruff and lip xerosis. These MCQs will help you apply theoretical knowledge to formulation decisions and safety evaluation, reinforcing critical concepts needed for advanced coursework and practical formulation development.

Q1. What is the primary function of a cosmetic cleanser for skin?

• To remove sebum, dirt, makeup and microbes from the skin surface
• To permanently increase stratum corneum thickness
• To act as a long‑term occlusive moisturizer
• To change skin pigmentation

Correct Answer: To remove sebum, dirt, makeup and microbes from the skin surface

Q2. The normal surface pH range of healthy human facial skin (acid mantle) is approximately:

• About 4.5–5.5
• About 6.8–7.4
• About 8.0–9.0
• About 2.0–3.0

Correct Answer: About 4.5–5.5

Q3. Which statement best describes a syndet (synthetic detergent) bar compared to traditional soap?

• Syndet bars are usually milder, more pH‑compatible with skin, and produce stable foam
• Syndet bars are more alkaline and harsher than soap
• Syndet bars are purely oil‑based and do not contain surfactants
• Syndet bars permanently seal pores with occlusive deposits

Correct Answer: Syndet bars are usually milder, more pH‑compatible with skin, and produce stable foam

Q4. Which surfactant class is most commonly used in high‑foaming rinse‑off cleansers and shampoos?

• Anionic surfactants (e.g., sodium lauryl sulfate)
• Cationic surfactants (e.g., quaternary ammonium salts)
• Nonionic surfactants (e.g., polysorbates)
• Silicone surfactants (e.g., dimethicone copolymers)

Correct Answer: Anionic surfactants (e.g., sodium lauryl sulfate)

Q5. Micellar water cleansers remove oil and makeup primarily by which mechanism?

• Micelles solubilize and entrap oils and lipophilic impurities without the need for strong surfactant action
• They permanently bond to skin proteins forming a protective film
• They rely on strong alkaline hydrolysis to dissolve sebum
• They deposit occlusives to block sebaceous secretion

Correct Answer: Micelles solubilize and entrap oils and lipophilic impurities without the need for strong surfactant action

Q6. Which formulation strategy is most effective to reduce irritation potential of a sulfate‑rich cleanser?

• Inclusion of amphoteric surfactants (e.g., cocamidopropyl betaine) and humectants to mitigate irritation
• Increase total surfactant concentration and pH above 9
• Remove all humectants and emollients
• Replace water with ethanol as the continuous phase

Correct Answer: Inclusion of amphoteric surfactants (e.g., cocamidopropyl betaine) and humectants to mitigate irritation

Q7. Why are the lips particularly susceptible to dryness and chapping compared with other facial skin?

• Thin stratum corneum and absence of sebaceous glands leading to reduced lipid barrier
• Excessive melanocyte activity increases water loss
• Lips have unusually high sebum production compared with other skin
• Lips possess a thicker stratum corneum that retains corneocytes

Correct Answer: Thin stratum corneum and absence of sebaceous glands leading to reduced lipid barrier

Q8. Zinc pyrithione, used in antidandruff shampoos, primarily acts by which mechanism?

• Antifungal and antibacterial activity effective against Malassezia species
• Strong keratolysis leading to complete removal of the stratum corneum
• Directly increasing sebum production to wash away scales
• Forming an occlusive film that prevents scaling

Correct Answer: Antifungal and antibacterial activity effective against Malassezia species

Q9. Which type of conditioning agent deposits on negatively charged hair and improves combability after shampooing?

• Cationic conditioning agents (e.g., quaternary ammonium salts)
• Anionic polymers (e.g., sodium polystyrene sulfonate)
• Strong acids (e.g., hydrochloric acid)
• Nonionic silicones with no charge

Correct Answer: Cationic conditioning agents (e.g., quaternary ammonium salts)

Q10. For minimizing disruption of the skin acid mantle, an appropriate pH target for a facial rinse‑off cleanser is:

• About 4.5–6.0
• About 8.0–9.0
• About 2.0–3.0
• Above 10.0

Correct Answer: About 4.5–6.0

Q11. Which excipient is commonly included in cleansers as a humectant to retain skin moisture after rinsing?

• Glycerin
• Isopropyl myristate
• Calcium carbonate
• Sodium chloride

Correct Answer: Glycerin

Q12. Which ingredient is well known for its high comedogenic potential and is therefore often avoided in facial cleansers aimed at acne‑prone skin?

• Isopropyl myristate
• Glycerin
• Polyethylene glycol (PEG) 400
• Sodium lauryl sulfate

Correct Answer: Isopropyl myristate

Q13. Which human clinical test is commonly used to assess the irritation and sensitization potential of topical cleansers?

• Repeat Insult Patch Test (RIPT) or Human Repeat Insult Patch Test
• Acute oral LD50 test
• Bronchial provocation challenge
• Single application pH meter test only

Correct Answer: Repeat Insult Patch Test (RIPT) or Human Repeat Insult Patch Test

Q14. An increase in transepidermal water loss (TEWL) after using a cleanser is an indicator of:

• Impaired skin barrier function
• Improved skin barrier repair
• Increased skin elasticity
• Enhanced melanogenesis

Correct Answer: Impaired skin barrier function

Q15. Which class of ingredients is most effective in lip balms to immediately prevent water evaporation from the lips?

• Occlusives (e.g., petrolatum) to prevent water loss
• Alcohols (e.g., ethanol) to dry the surface
• Strong acids to exfoliate rapidly
• High levels of sodium chloride

Correct Answer: Occlusives (e.g., petrolatum) to prevent water loss

Q16. A key environmental and formulation advantage of solid shampoo bars over liquid shampoos is:

• Lower water content, concentrated formula and reduced packaging waste
• Higher water content and larger plastic bottles required
• Inability to incorporate conditioning agents
• Mandatory use of traditional soap only

Correct Answer: Lower water content, concentrated formula and reduced packaging waste

Q17. Which preservative is commonly used in modern water‑based cosmetic cleansers for broad‑spectrum microbial control with acceptable safety profile?

• Phenoxyethanol
• Mercury chloride
• Formaldehyde gas
• Sodium hypochlorite

Correct Answer: Phenoxyethanol

Q18. To improve mildness of a surfactant system while retaining cleaning efficacy, formulators often add which co‑surfactant?

• Amphoteric surfactants (e.g., cocamidopropyl betaine)
• Strong anionic surfactants only
• Concentrated mineral acids
• High molecular weight salts

Correct Answer: Amphoteric surfactants (e.g., cocamidopropyl betaine)

Q19. For gentle exfoliation of chapped lips, which type of agent is preferred in lip care formulations?

• Mild AHA (e.g., lactic acid) used for lip exfoliation
• High concentration salicylic acid peel (20%)
• Strong alkali (pH >11) for rapid sloughing
• Crystalline quartz particles only

Correct Answer: Mild AHA (e.g., lactic acid) used for lip exfoliation

Q20. Which active ingredient is commonly included in scalp formulations to reduce sebum‑related scaling and improve scalp clarity?

• Salicylic acid (keratolytic) helps reduce sebum‑related scaling
• High levels of sodium lauryl sulfate to increase oil production
• Pure petrolatum applied to the scalp daily
• Concentrated sugar syrups to occlude follicles

Correct Answer: Salicylic acid (keratolytic) helps reduce sebum‑related scaling

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