Pharmacy Practice MCQ, in this article we will solve, Practice MCQ under subject Physical Pharmaceutics. Read following article for your reference.
Surface Active Agents (Surfactants) And Spreading Coefficient » PHARMACAREERS
- What is the primary function of surfactants?
- A) Increase surface tension
- B) Decrease surface tension
- C) Neutralize surface tension
- D) None of the above
- Which part of a surfactant molecule is hydrophilic?
- A) Tail
- B) Head
- C) Both head and tail
- D) Neither head nor tail
- What does HLB stand for?
- A) Hydrophilic-Lipophilic Balance
- B) Hydrophobic-Lipophilic Balance
- C) Hydrophilic-Lipophobic Balance
- D) Hydrophobic-Lipophobic Balance
- Surfactants with an HLB value of 1-3 are typically used as:
- A) Detergents
- B) Emulsifiers
- C) Antifoaming agents
- D) Wetting agents
- Which type of surfactant is most effective in oil-in-water emulsions?
- A) Low HLB surfactants
- B) High HLB surfactants
- C) Medium HLB surfactants
- D) HLB value does not matter
- What is the role of surfactants in detergency?
- A) Increase surface tension
- B) Form micelles to trap dirt
- C) Decrease solubility
- D) None of the above
- Which of the following is a common application of surfactants?
- A) Pharmaceuticals
- B) Food industry
- C) Cosmetics
- D) All of the above
- What does the term ‘spreading coefficient’ refer to?
- A) The ability of a liquid to spread on a solid surface
- B) The ability of a solid to spread on a liquid surface
- C) The ability of a gas to spread on a liquid surface
- D) None of the above
- Which factor does NOT affect the spreading coefficient?
- A) Surface tension
- B) Temperature
- C) Molecular weight
- D) Viscosity
- What is the significance of the critical micelle concentration (CMC)?
- A) It is the concentration above which micelles form
- B) It is the concentration below which micelles form
- C) It is the concentration at which surfactants lose their effectiveness
- D) None of the above
- Which surfactant type is known for its excellent emulsifying properties?
- A) Anionic
- B) Cationic
- C) Nonionic
- D) Amphoteric
- What is the primary characteristic of nonionic surfactants?
- A) They carry a positive charge
- B) They carry a negative charge
- C) They do not carry any charge
- D) They carry both positive and negative charges
- Which surfactant is commonly used in shampoos and body washes?
- A) Anionic surfactants
- B) Cationic surfactants
- C) Nonionic surfactants
- D) Amphoteric surfactants
- What does the term ‘amphiphilic’ mean in the context of surfactants?
- A) Having both hydrophilic and hydrophobic parts
- B) Having only hydrophilic parts
- C) Having only hydrophobic parts
- D) None of the above
- Which surfactant type is typically used in fabric softeners?
- A) Anionic
- B) Cationic
- C) Nonionic
- D) Amphoteric
- What is the effect of surfactants on the interfacial tension between oil and water?
- A) Increase interfacial tension
- B) Decrease interfacial tension
- C) No effect on interfacial tension
- D) None of the above
- Which surfactant is most likely to be used in antimicrobial formulations?
- A) Anionic
- B) Cationic
- C) Nonionic
- D) Amphoteric
- What is the role of surfactants in pharmaceuticals?
- A) Enhance solubility of drugs
- B) Act as preservatives
- C) Provide color to formulations
- D) None of the above
- Which surfactant type is known for its mildness and is often used in baby products?
- A) Anionic
- B) Cationic
- C) Nonionic
- D) Amphoteric
- What is the primary function of emulsifiers in food products?
- A) Increase shelf life
- B) Improve taste
- C) Stabilize emulsions
- D) Provide color
- Which surfactant type is typically used in conditioners to provide a smooth feel to hair?
- A) Anionic
- B) Cationic
- C) Nonionic
- D) Amphoteric
- What is the effect of temperature on the critical micelle concentration (CMC)?
- A) CMC increases with temperature
- B) CMC decreases with temperature
- C) CMC remains constant with temperature
- D) None of the above
- Which surfactant type is most effective in acidic conditions?
- A) Anionic
- B) Cationic
- C) Nonionic
- D) Amphoteric
- What is the primary characteristic of amphoteric surfactants?
- A) They can act as both anionic and cationic surfactants
- B) They are always neutral
- C) They are hydrophobic
- D) None of the above
- Which surfactant is commonly used in dishwashing liquids?
- A) Anionic surfactants
- B) Cationic surfactants
- C) Nonionic surfactants
- D) Amphoteric surfactants
- What is the role of surfactants in spreading?
- A) Increase surface tension
- B) Decrease surface tension
- C) Neutralize surface tension
- D) None of the above
- Which surfactant type is known for its ability to form stable foams?
- A) Anionic
- B) Cationic
- C) Nonionic
- D) Amphoteric
- What is the primary use of surfactants in the textile industry?
- A) Dyeing
- B) Softening
- C) Cleaning
- D) All of the above
- Which surfactant type is typically used in antiseptic solutions?
- A) Anionic
- B) Cationic
- C) Nonionic
- D) Amphoteric
- What is the effect of surfactants on the solubility of hydrophobic substances?
- A) Increase solubility
- B) Decrease solubility
- C) No effect on solubility
- D) None of the above
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