GPAT/NIPER/Pharmacist Recruitment Exams MCQs on Semisolid Dosage Forms.

Q1. Assertion (A): Ointments have higher occlusive properties than creams.
Reason (R): Ointments have a higher proportion of hydrocarbons.

A. Both A and R are true, and R explains A
B. Both A and R are true, but R does not explain A
C. A is true, R is false
D. A is false, R is true

Answer: A

Trap: Hydrocarbon bases mean occlusion, which means moisture retention.

Q2. Which one of the statements is correct?

1. Pastes have a higher proportion of solids than ointments

2. Gels are a transparent system.

3. Creams have monophasic systems

4. Ointments are greasy.

A. 1, 2, 3

B. 1, 3, 4
C. 2, 3, 4
D. 1, 2, 4

Answer: D

• Pastes have a higher proportion of solids than ointments: Correct. Pastes are thick preparations with a high content of insoluble powders, making them stiffer than ointments.

• Gels are a transparent system: Correct. Gels are usually semisolid systems where liquid is dispersed in a network, often appearing clear or translucent.

• Creams have monophasic systems: Incorrect. Creams are emulsions, typically biphasic (oil-in-water or water-in-oil).

• Ointments are greasy: Correct. Ointments are semisolid preparations, often greasy due to their high oil or hydrocarbon base.

Trap: Cream is biphasic (emulsion), not monophasic.

Q3. Which formulation is for acute weeping eczema?

A. Paste
B. Ointment
C. Oil-in-water cream
D. All

Answer: C

Explanation:

• Pastes: Too occlusive and heavy; not suitable for weeping lesions.

• Ointments: Greasy and occlusive; they trap moisture, which can worsen weeping eczema.

• Oil-in-water creams: These are lighter, less greasy, and allow fluid evaporation from the skin. It makes them ideal for acute, exudative (weeping) conditions.

• All: Incorrect, because not all formulations are appropriate here.

Trap: O/W cream is less occlusive and absorbs exudate easily.

Q4. MOST suitable semisolid dosage form for dry scaly lesions is

A. Lotion
B. Dusting powder
C. Ointment
D. Gel

Answer: C

Trap Insight: Ointment: occlusive: retains moisture.

Explanation:

Dry, scaly lesions require a dosage form that provides maximum occlusion and hydration.

• Ointments are greasy, highly occlusive semisolid preparations.

  • They prevent water loss from the skin (emollient effect)

  • Help in softening and rehydrating dry, scaly lesions

Why not others?

• Lotion: More suitable for hairy or oozing/wet lesions, not dry skin

• Dusting powder: Used for moist areas, absorbs moisture (can worsen dryness)

• Gel: Mostly non-greasy and drying, better for oily skin conditions

GPAT/NIPER Concept Trap:

• Dry lesion: Ointment (occlusive)

• Wet lesion: Cream/Lotion (less occlusive)

Always link the type of lesion (dry vs. wet) with the degree of occlusiveness of the dosage form.

Q5. Match the following

Dosage Form Characteristic

• A. Ointment 1. Occlusive

• B. Gel 2. Transparent

• C. Paste 3. High solid content

• S. Cream 4. Emulsion

Correct combination:

A. A-4, B-2, C-3, S-1
B. A-2, B-4, C-3, S-1
C. A-3, B-1, C-4, S-2
D. A-1, B-2, C-3, S-4

Answer: D A-1, B-2, C-3, S-4

Matching logic:

• A. Ointment: 1. Occlusive
  Highly greasy: forms a protective film; prevents moisture loss

• B. Gel: 2. Transparent
  Clear/transparent due to colloidal dispersion

• C. Paste: 3. High solid content
  Contains a large amount of insoluble solids (e.g., zinc oxide)

• S. Cream: 4. Emulsion
  Either O/W or W/O emulsion

Quick GPAT/Other Exams Trick:

• Ointment is occlusive.

• Gel is Clear

• Paste is Powder-rich

• Cream is an emulsion

These are standard one-liners frequently asked in exams.

Q6. Semisolid dosage form characteristic:

A. Turbulent flow
B. Newtonian flow
C. Plastic flow with yield value
D. Ideal flow

Answer: C

Trap Insight: Yield value is a key GPAT concept.

Explanation:

Most semisolid dosage forms (like ointments, creams, and pastes) exhibit non-Newtonian behavior, specifically plastic flow.

• They do not flow until a certain stress is applied → called yield value

• Once this yield value is exceeded, they start flowing like a liquid

Why not others?

• A. Turbulent flow → Seen in high-velocity fluids, not semisolids

• B. Newtonian flow → Constant viscosity (e.g., water), not typical for semisolids

• D. Ideal flow → Not a standard rheological term in pharmaceutics

GPAT/NIPER Concept:

Semisolids = Plastic (Bingham) flow + Yield value

Yield value is the minimum stress (force per unit area) that must be applied to a semisolid before it starts to flow.

• Below yield value → behaves like a solid (no flow)

• Above yield value → behaves like a liquid (flows)

One-liner: Yield value = force needed to initiate flow in semisolids

Q7. Main disadvantage of semisolid dosage forms is

A. Poor dose uniformity
B. Localized drug delivery
C. High patient compliance
D. Ease of application

Answer: A

Explanation:

Semisolid dosage forms (ointments, creams, and gels) are applied topically, and the exact amount applied varies from person to person.

This leads to:

• Inconsistent dosing

• Difficulty in measuring an accurate dose per application

Why not others?

• B. Localized drug delivery → Advantage

• C. High patient compliance → Advantage

• D. Ease of application → Advantage

Key Point:

A major limitation of semisolids: The dose cannot be accurately controlled

Q8. MOST occlusive base is

A. Absorption base
B. Emulsion base
C. Water-soluble base
D. Hydrocarbon base

Answer: D. Hydrocarbon base

Explanation:

Hydrocarbon bases (e.g., soft paraffin/petrolatum) are the most occlusive.

They:

• Form a hydrophobic film on the skin

• Prevent transepidermal water loss (TEWL)

• Provide maximum emollient and protective effect

Occlusiveness order (high to low):

Hydrocarbon > Absorption base > Emulsion base > Water-soluble base

Why not others?

• Absorption base → Moderately occlusive

• Emulsion base → Less occlusive (especially O/W creams)

• Water-soluble base → Non-occlusive, easily washable

GPAT/NIPER Trick:

"Greaser the base: Higher the occlusion."

Q9. Which dosage form is BEST for the body's hairy regions?

A. Gel
B. Paste
C. Hydrocarbon base
D. Ointment

Answer: A

Trap: Non-greasy + washable.

Explanation:

For hairy regions, the ideal dosage form should be:

• Non-greasy

• Easily spreadable

• Does not mat or stick to hair

Gels fulfill all these criteria:

• Water-based, light and non-oily

• Dry quickly

• Leave no residue

Why not others?

• Paste: Thick, stiff, difficult to apply on hair

• Hydrocarbon base: Very greasy, sticky

• Ointment: Occlusive and greasy: unpleasant on hairy areas

GPAT/NIPER Trick:

Hairy area: Gel | Dry lesion: Ointment | Wet lesion: Cream/Lotion

Q10.

Assertion (A): Gels have a cooling effect on application.
Reason (R): Gels have a high proportion of water that evaporates.

A. Both A and R are true, and R explains A
B. Both A and R are true, but R does not explain A
C. A is true, R is false
D. A is false, R is true

Answer: A

Explanation:

• Assertion (A): Gels provide a cooling effect

• Reason (R): Gels contain a high proportion of water, which evaporates after application

When water evaporates from the skin, it absorbs heat (latent heat of vaporization), producing a cooling sensation.

GPAT Concept:

Cooling effect of gels = due to water evaporation

Q11. Which of the following is a single-phase semisolid system?

A. Lotion
B. Emulsion
C. Gel
D. Cream

Answer: C

Explanation:

• Gels are single-phase systems where the liquid (usually water) is uniformly dispersed within a three-dimensional polymeric network.

Why not others?

• Lotion: Biphasic (usually emulsion)

• Emulsion: Two-phase system (oil + water)

• Cream: Semisolid emulsion (two-phase)

GPAT/NIPER Key Point:

Gel = Single phase. Cream/Emulsion = Biphasic

Q12. Semisolid dosage forms are sensitive to:

A. Microbial contamination
B. Sublimation
C. Oxidation only
D. Hydrolysis only

Answer: A

Explanation:

Semisolid dosage forms (especially creams and gels) often contain water, making them highly susceptible to microbial growth.

Hence:

• Require preservatives

• Need proper storage and handling

Why not others?

• B. Sublimation → Not relevant for semisolids

• C. Oxidation only → Too specific; not the main concern

• D. Hydrolysis only → Also too specific

GPAT/NIPER Concept:

Presence of water: Risk of microbial contamination; thus, need preservatives

Q13. A patient complaining of a greasy feel and staining of clothes with a topical formulation. Which topical formulation form was MOST likely used?

A. Ointment
B. Cream
C. Lotion
D. Gel

Answer: A

The correct answer is: A. Ointment

Explanation:

Ointments are:

• Highly greasy

• Occlusive

• Tend to leave residue on skin and clothes

This leads to:

• Unpleasant greasy feel

• Staining of clothes

Why not others?

• Cream → Less greasy, better cosmetic acceptability

• Lotion → Fluid, non-greasy

• Gel → Non-oily, dries quickly

GPAT/NIPER Concept:

Greasy and staining complaint means ointment

Q14. Which factors affect drug release from semisolid dosage forms?

1. Viscosity of base

2. Drug solubility in base

3. Partition coefficient

4. Surface area of application

A. 1, 2, 3
B. 3, 4, 1
C. 2, 3, 4
D. All

Answer: D

The correct answer is: D. All

Explanation:

All listed factors influence drug release from semisolid dosage forms:

• Viscosity of base: Higher viscosity. Slower drug diffusion

• Drug solubility in base: Lower solubility. Better release (drug escapes base more easily)

• Partition coefficient: Determines drug movement from base to skin

• Surface area of application: Larger area. More drug available for absorption

GPAT/NIPER Concept:

Drug release from semisolids depends on formulation factors and application conditions

Q15. Which semisolid dosage form is BEST for protective action that has minimal drug absorption?

A. Cream
B. Ointment
C. Paste
D. Gel

Answer: C

Trap: Paste: high solids. Protective barrier.

Explanation:

Pastes are ideal when you want protective action with minimal drug absorption because:

• They contain high amounts of insoluble solids (25–50%)

• Form a thick, protective barrier

• Do not penetrate deeply into the skin

Common use: Zinc oxide paste for protective purposes

Why not others?

• Cream → Allows moderate absorption

• Ointment → Occlusive and enhances drug penetration

• Gel → Promotes drug release and absorption

GPAT/NIPER Key:

Paste = Protective + Minimal absorption

Key Points to Revise

• Very High Frequency Areas:

  • Ointment vs Cream vs Gel (clinical selection)

  • Base classification (hydrocarbon vs absorption)

  • Rheology (plastic flow, yield value)

  • Occlusiveness & hydration

• Moderate Frequency:

  • Phase systems (mono vs biphasic)

  • Microbial contamination

  • Drug release factors

• Rare but tricky:

  • Matching questions

  • Case-based irritation/greasiness

Dr. Alok Singh

Q16. Which of the following is the best definition of semisolid dosage forms?

A. Preparations with fixed shape and volume
B. Preparations with consistency between solid and liquid
C. Liquid preparations having high viscosity
D. Preparations only for systemic action

Correct Answer: B

Explanation:
A dosage form with intermediate consistency between solid and liquid is a semisolid dosage form. They are mainly used as topical preparations.
Trap: C is incomplete (not all viscous liquids are semisolids).

Semisolid dosage forms are defined by their intermediate consistency. They are neither completely solid nor fully liquid. They can retain their shape to some extent but can also flow under stress. This makes them suitable for topical application (e.g., ointments, creams, gels, pastes).

Why others are incorrect:

• A: Describes solid dosage forms (like tablets).

• C: High viscosity liquids may resemble semisolids but are still classified as liquids.

• D: Semisolids are mainly used for local action, not exclusively systemic.

This is a classic GPAT/NIPER conceptual trap—focus on consistency, not just viscosity or use.

Q17. High-viscosity Which of the following are semisolid dosage forms?

1. Ointment

2. Cream

3. Gel

4. Syrup

A. 1,2,3
B. 2,3,4
C. 3,2,4
D. All

Correct Answer: A

Explanation:
Semisolid dosage forms include ointments, creams, gels, pastes.
Trap: Syrup is liquid.

Q18. Which semisolid dosage form provides maximum occlusive effect?

A. Lotion
B. Cream (O/W)
C. Gel
D. Ointment (hydrocarbon base)

Correct Answer: C

Explanation:
Hydrocarbon ointments are highly occlusive. It retains moisture.
GPAT Trap: Students confuse cream with ointment.

Q19.

Assertion (A): Semisolids provide prolonged drug action.
Reason (R): They remain in contact for a longer duration at the site of application.

A. Both true, R explains A
B. Both true, R does not explain A
C. A true, R false
D. A false, R true

Correct Answer: A

Explanation:
Semisolids adhere to skin/mucos membrane. This prolongs drug action.

Q20. Which one is a biphasic semisolid system?

A. Ointment
B. Paste
C. Cream
D. Gel

Correct Answer: C

Explanation:
Cream is an emulsion system (O/W or W/O), a biphasic system.
Trap: Gel is usually single-phase.

Q21. Which is NOT an advantage of semisolid dosage forms?

A. Easy to apply
B. Local drug delivery
C. Accuracy in dosing compared to tablets
D. Improved compliance

Correct Answer: C

Explanation:

Semisolid dosage forms (ointments, creams, gels, pastes) generally do not provide highly accurate dosing. The amount applied depends on the patient or applicator (e.g., fingertip application, layer thickness, area covered).

Why other options are advantages:

• A. Easy to apply
  Convenient for external use.

• B. Local drug delivery
  Delivers drug directly to site of action, reducing systemic effects.

• D. Improved compliance
  Often preferred due to ease of use and reduced dosing frequency.

GPAT/NIPER trap:

Tablets/capsules = precise dose
Semisolids = variable dose

Correct answer: C

Q22. Which ONE is a major limitation of semisolid dosage forms?

A. Fast systemic absorption
B. Difficult to manufacture on a large scale
C. Microbial contamination
D. Chemical stability

Correct Answer: C

Explanation:
Presence of water: Prone to microbial growth risk.

The correct answer is:

Explanation:

Semisolid dosage forms (especially creams and gels) often contain water. This makes them prone to microbial growth. This requires preservatives and careful handling/storage.

Why other options are incorrect:

• A. Fast systemic absorption
  Not a limitation—semisolids usually provide local action, not rapid systemic absorption.

• B. Difficult to manufacture on a large scale
  They are relatively easy to manufacture with standard equipment.

• D. Chemical stability
  While stability can be an issue, it is not the major/general limitation compared to microbial contamination.

GPAT/NIPER key point:

Water-containing semisolids = contamination risk. Require preservatives.

Correct answer: C

Q23. Match the following:

Dosage form Property

• A. Paste 1. High solid content

• B. Gel 2. Transparent system

• C. Cream 3. Emulsion

• D. Ointment 4. Greasy base

  Correct match:

A. A-1, B-2, C-3, D-4
B. A-2, B-1, C-3, D-4
C. A-1, B-3, C-2, D-4
D. A-4, B-2, C-1, D-3

Answer: A. A-1, B-2, C-3, D-4

Explanation:

• A. Paste → 1. High solid content
  Pastes contain a large proportion of finely dispersed solids (often >25%).

• B. Gel → 2. Transparent system
  Gels are typically clear or translucent, formed by a three-dimensional network.

• C. Cream → 3. Emulsion
  Creams are semisolid emulsions (O/W or W/O).

• D. Ointment → 4. Greasy base
  Ointments usually have oleaginous (greasy) bases.

GPAT Trap:

• Don’t confuse gel (transparent) with cream (emulsion, opaque)

• Don’t forget paste = high solid content (protective action)

Correct match: A

Q24. Semisolid dosage forms exhibit:

A. Newtonian flow
B. Plastic flow behavior
C. Ideal gas behavior
D. Zero viscosity

Correct Answer: B

Explanation: Semisolid dosage forms show plastic (malleable behavior under stress)

The correct answer is:

B. Plastic flow behavior

Explanation:

Most semisolid dosage forms (like ointments, creams, and pastes) exhibit plastic (Bingham) flow. They require a yield stress to start flowing, and once that stress is exceeded, they flow like a viscous liquid.

Why others are incorrect:

• A. Newtonian flow: Newtonian systems (like simple liquids) flow immediately with applied stress—no yield value.

• C. Ideal gas behavior: Completely irrelevant to semisolids.

• D. Zero viscosity: Semisolids have high viscosity, not zero.

GPAT/NIPER Insight:

Semisolids = Non-Newtonian: Plastic or pseudoplastic behavior (with yield value)

Correct answer: B

Q25. Which of the following is TRUE for semisolid dosage forms?

A. Only for local APPLICATION
B. Does produce systemic effect
C. Deliver drug transdermally
D. Suitable only for dermatological conditions

Correct Answer: C Deliver drug transdermally

Explanation:

Semisolid dosage forms (ointments, creams, gels) are primarily used for local action. But they can also be designed to deliver drugs through the skin into systemic circulation (transdermal delivery) e.g., medicated gels or specialized formulations.

Why others are incorrect:

• A. Only for local application
  Too absolute—some semisolids can produce systemic effects.

• B. Does produce systemic effect
  Not always true; most are intended for local action.

• D. Suitable only for dermatological conditions
  They can also be used for rectal, vaginal, ophthalmic, etc.

GPAT/NIPER Trap:

Watch for extreme words like “only” → usually incorrect.

Correct answer: C

Q26. For oozing lesions, the preferred semisolid dosage form is:

A. Paste
B. Hydrocarbon base
C. Cream (O/W)
D. Ointment

Correct Answer: C

Explanation:
O/W creams are less occlusive and absorb exudates.
GPAT classic clinical trap.

The correct answer is:

• Oozing (weeping) lesions require a formulation that is non-greasy, soothing, and allows evaporation of moisture.

• Oil-in-water (O/W) creams are ideal because they are water-washable, less occlusive, and promote drying.

Why others are incorrect:

• A. Paste

  Good for protective action but too stiff; used more for non-oozing lesions.

• B. Hydrocarbon base
  Highly occlusive (e.g., petrolatum) → traps moisture → worsens oozing.

• D. Ointment
  Greasy and occlusive → not suitable for wet lesions.

Clinical/Exam Insight:

• Wet (oozing) lesions: O/W cream

• Dry lesions: Ointment (occlusive)

Correct answer: C

Q27. Identify the correct information:

A. Pastes contain less solid content than ointments
B. Ointments are water-soluble preparations
C. Creams are emulsions
D. Gels are oil-based preparations

Correct Answer: C. Creams are emulsions

• C. Creams are emulsions
  Creams are semisolid emulsions (either O/W or W/O), which is their defining characteristic.

Why others are incorrect:

• A. Pastes contain less solid content than ointments
  Opposite is true—pastes have higher solid content (often >25%).

• B. Ointments are water-soluble preparations
  Most ointments are oleaginous (greasy) and water-insoluble.

• D. Gels are oil-based preparations
  Gels are usually water-based systems with a polymeric network.

GPAT Trap:

• Cream = Emulsion (key identity)

• Paste = High solid

• Ointment = Greasy

• Gel = Aqueous network

✅ Correct answer: C

Q28. A patient needs a non-greasy, washable formulation with a cooling effect. Which one is best

A. Ointment
B. Paste
C. Gel
D. Hydrocarbon base

Answer: C

The correct answer is:

C. Gel

• Gels are non-greasy, water-based, and provide a cooling effect due to evaporation of water/alcohol.

• They are also easy to wash, making them ideal for patient comfort and compliance.

Why others are incorrect:

• A. Ointment
  Greasy and occlusive → not washable.

• B. Paste
  Thick, stiff, and less spreadable → not cooling.

• D. Hydrocarbon base
  Highly greasy (e.g., petrolatum) → occlusive and non-washable.

GPAT/NIPER Keypoints:

Non-greasy + washable + cooling: think “GEL” immediately

Correct answer: C

Q29. Which property contributes BOTH to advantage and disadvantage?

A. High viscosity
B. Water content
C. Occlusiveness
D. Plasticity

Answer: C

Explanation:

Here’s a crisp, blog-ready summary for your MCQs:

Occlusiveness: A Classic Double-Edged Property (GPAT/NIPER)

Advantage:

• Prevents moisture loss → enhances skin hydration

• Improves drug penetration (especially ointments)

Disadvantage:

• Causes maceration of skin

• Worsens oozing (wet) lesions

• Feels greasy → reduces patient compliance

Why Other Options Are Less Appropriate:

• A. High viscosity → affects spreadability only

• B. Water content → mainly linked to contamination risk

• D. Plasticity → related to flow behavior, not therapeutic impact

GPAT/NIPER TRAP: Why NOT “Water Content”?

Water content shows mixed effects but is not the primary dual-impact property.

Advantage:

• Cooling effect

• Better spreadability & washability

Disadvantage:

• Microbial contamination

• Needs preservatives

These are formulation issues, not core therapeutic effects.

Why Occlusiveness is Preferred:

• Directly impacts clinical outcome + drug absorption

  • Increased Hydration, Increased Penetration

  • Increased Maceration, Wet lesions worsen, Greasy feel

Final Exam Insight:

• Water content: Stability issue

• Occlusiveness: Clinical double-edged property

👉 Occlusive bases (ointments):

• Best for dry lesions

• Worst for oozing lesions

Correct Answer: C. Occlusiveness

GPAT/NIPER Takeaways

• Definition trap: Intermediate between solid & liquid

• Classification: Ointment, Cream, Gel, Paste

• Ointment: Occlusive, greasy

• Cream: Emulsion (biphasic)

• Gel: Non-greasy, transparent

• Paste: High solid content

• Advantages: Local action, adherence, patient compliance

• Disadvantages: Poor dose accuracy, contamination risk

Dr. Alok Singh