Liquid dosage forms are a cornerstone of pharmaceutical science, offering advantages like easier administration, flexible dosing, and rapid absorption. For B.Pharm students, mastering the formulation and principles of both monophasic and biphasic liquids is essential. This quiz covers key topics, including syrups, elixirs, suspensions, and emulsions, focusing on their preparation, stability, and classification, which are vital for effective pharmaceutical practice.
- Which of the following is a biphasic liquid dosage form?
- Syrup
- Elixir
- Emulsion
- Lotion
- Clear, sweetened, hydroalcoholic solutions for oral use are known as:
- Syrups
- Suspensions
- Elixirs
- Gargles
- In a suspension, the formation of a hard, non-resuspendable sediment is called:
- Flocculation
- Creaming
- Caking
- Coalescence
- The HLB (Hydrophile-Lipophile Balance) system is used to select an appropriate:
- Sweetening agent
- Preservative
- Emulsifying agent
- Suspending agent
- Which of the following is a primary advantage of liquid dosage forms?
- They are always more stable than solid forms.
- They offer ease of administration for pediatric and geriatric patients.
- They have no taste or odor issues.
- They have a longer shelf life than powders.
- A suspension in which particles form loosely-packed aggregates is known as a(n):
- Deflocculated suspension
- Flocculated suspension
- Emulsion
- Solution
- Syrups are concentrated aqueous solutions of:
- Alcohol
- Salt
- Sugar
- Oil
- The dilution test is used to identify the type of a(n):
- Suspension
- Elixir
- Syrup
- Emulsion
- Liniments are intended to be applied to the skin with:
- No friction
- Friction and rubbing
- A sterile bandage
- Water
- The irreversible merging of smaller droplets into larger ones in an emulsion is called:
- Creaming
- Sedimentation
- Coalescence
- Flocculation
- Which of the following is an example of a monophasic liquid dosage form?
- Suspension
- Emulsion
- Mouthwash
- Magma
- The main difference between a lotion and a liniment is the:
- Route of administration
- Method of application
- Viscosity
- Active ingredient
- In a deflocculated suspension, the particles settle:
- Rapidly to form a loose sediment
- Slowly to form a dense, hard cake
- Not at all
- As flocs
- Which excipient is used in liquid formulations to prevent the growth of microorganisms?
- Sweetener
- Flavoring agent
- Coloring agent
- Preservative
- An o/w emulsion will be miscible with:
- Oil
- Water
- Both oil and water
- Neither oil nor water
- Gargles are aqueous solutions used for treating infections of the:
- Stomach
- Ear canal
- Throat
- Nasal passages
- The upward movement of the dispersed phase in an emulsion is termed:
- Sedimentation
- Cracking
- Creaming
- Phase inversion
- The main vehicle in an elixir is a blend of:
- Water and sugar
- Water and oil
- Water and alcohol
- Water and glycerin
- A substance that increases the viscosity of the dispersion medium in a suspension is a(n):
- Emulsifying agent
- Wetting agent
- Suspending agent
- Flocculating agent
- Throat paints are typically more ______ than gargles.
- Dilute
- Viscous
- Volatile
- Palatable
- Which of the following is NOT a method for solubility enhancement?
- Use of co-solvents
- Complexation
- Particle size reduction
- Use of an anti-adherent
- The complete and irreversible separation of the two phases in an emulsion is called:
- Creaming
- Breaking (or cracking)
- Sedimentation
- Phase inversion
- Enemas are liquid preparations administered:
- Orally
- Topically
- Rectally
- Ocularly
- Stoke’s Law describes the:
- Rate of dissolution
- Rate of sedimentation in a suspension
- Stability of an emulsion
- Surface tension of a liquid
- The primary purpose of a vehicle in a liquid dosage form is to:
- Act as the therapeutic agent
- Provide a pleasant taste
- Act as a carrier for the active ingredients
- Prevent microbial growth
- In an o/w emulsion, the continuous phase is:
- Oil
- Water
- Solid particles
- Air
- A major disadvantage of liquid dosage forms is their:
- Slower onset of action compared to solids
- Bulkiness and potential for lower stability
- Inflexibility in dosing
- Difficulty in swallowing
- Which of the following is used to treat conditions of the ear?
- Nasal drops
- Gargles
- Enemas
- Ear drops
- The dye test for emulsion identification involves adding a(n) ______ dye to the sample.
- water-soluble
- oil-soluble
- insoluble
- fluorescent
- What is the primary difference between a suspension and a solution?
- Suspensions are clear, while solutions are cloudy.
- In a solution, the drug is dissolved; in a suspension, it is dispersed as solid particles.
- Suspensions are always for oral use.
- Solutions contain an emulsifying agent.
- Which of the following would NOT be considered an excipient in a liquid dosage form?
- Vehicle
- Active Pharmaceutical Ingredient (API)
- Preservative
- Coloring agent
- A “shake well before use” label is mandatory for which dosage form?
- Elixir
- Syrup
- Suspension
- Solution
- Phase inversion of an emulsion is the process where:
- The emulsion breaks
- The droplets cream
- An o/w emulsion changes to a w/o emulsion
- The droplets coalesce
- Mouthwashes are primarily used to:
- Treat throat infections
- Cleanse and deodorize the oral cavity
- Be swallowed for systemic effect
- Provide medication to the lungs
- The rate of sedimentation in a suspension is ______ to the viscosity of the dispersion medium.
- directly proportional
- inversely proportional
- not related
- equal
- An emulsifying agent with a high HLB value (e.g., 8-18) is suitable for forming a(n):
- w/o emulsion
- o/w emulsion
- suspension
- solution
- Which of the following is NOT a desirable property of a pharmaceutical suspension?
- The particles should settle slowly.
- The sediment should be easily re-dispersible.
- The sediment should form a hard cake.
- It should have an elegant appearance.
- The term “monophasic” means the system consists of:
- One phase
- Two phases
- Three phases
- Solid and liquid phases
- Which liquid dosage form is applied to the skin without friction and usually for a protective or emollient effect?
- Liniment
- Lotion
- Throat paint
- Collodion
- The continental or “dry gum” method is a technique used to prepare:
- Suspensions
- Syrups
- Elixirs
- Emulsions
- A wetting agent is often added to suspensions to:
- Increase viscosity
- Improve the dispersion of hydrophobic solid particles in the aqueous vehicle
- Prevent microbial growth
- Sweeten the preparation
- A liquid dosage form containing one or more active ingredients dissolved in a suitable solvent is a(n):
- Suspension
- Emulsion
- Solution
- Magma
- Compared to syrups, elixirs are generally:
- More viscous
- Sweeter
- Less stable
- Less effective at masking taste
- The “caking” of a suspension is a sign of:
- Good stability
- Flocculation
- Irreversible instability
- A properly formulated product
- Which of the following is NOT a type of monophasic liquid?
- Drops
- Liniment
- Gargle
- Gel
- The dispersed phase in an o/w emulsion consists of:
- Water globules
- Oil globules
- Solid particles
- Gas bubbles
4t7. A key stability concern for elixirs is: * Sedimentation * Evaporation of the alcohol * Caking * Creaming
**Answer:** Evaporation of the alcohol
- The flocculated state in a suspension is generally considered to be:
- An undesirable sign of instability
- A desirable state to prevent caking
- The final stage before breaking
- A sign of microbial growth
- Which of the following can be used for both internal and external purposes?
- Liniments
- Enemas
- Lotions
- Solutions
- The classification of a liquid dosage form as biphasic means it contains:
- Two active ingredients
- Two distinct immiscible phases
- Two different solvents
- Two preservatives
I am a Registered Pharmacist under the Pharmacy Act, 1948, and the founder of PharmacyFreak.com. I hold a Bachelor of Pharmacy degree from Rungta College of Pharmaceutical Science and Research. With a strong academic foundation and practical knowledge, I am committed to providing accurate, easy-to-understand content to support pharmacy students and professionals. My aim is to make complex pharmaceutical concepts accessible and useful for real-world application.
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