MCQ set on Monophasic Liquid Dosage Forms tailored for GPAT and Pharmacist Recruitment Exams (HSSC, AIIMS, ESIC, Railway, etc.).

Q1. Monophasic liquid dosage forms are defined as:
A. Systems containing two immiscible phases
B. Homogeneous systems with a single phase
C. Suspensions with solid particles
D. Emulsions with oil and water

Correct Answer: B
Explanation: Monophasic systems are clear, homogeneous solutions.

Q2. Which of the following is a monophasic liquid dosage form?
A. Suspension
B. Emulsion
C. Syrup
D. Lotion

Correct Answer: C
Explanation: Syrups are true solutions (monophasic).

Q3. The most commonly used solvent in monophasic dosage forms is:
A. Ether
B. Chloroform
C. Water
D. Benzene

Correct Answer: C
Explanation: Water is the safest, most economical, and widely used.

Q4. The concentration of sucrose in a standard syrup is approximately:
A. 25%
B. 45%
C. 66.7%
D. 90%

Correct Answer: C
Explanation: 66.7% w/w sucrose provides self-preservation.

Q5. High sugar concentration in syrups prevents microbial growth by:
A. Hydrolysis
B. Oxidation
C. Osmotic pressure
D. Reduction

Correct Answer: C

Q6. Elixirs are
A. Aqueous solutions only
B. Hydroalcoholic sweetened solutions
C. Oil-based solutions
D. Suspensions

Correct Answer: B

Q7. Alcohol in elixirs primarily acts as:
A. Sweetening agent
B. Preservative and solvent
C. Preservative
D. solvent

Correct Answer: B

Q8. Linctuses are mainly used for:
A. Pain relief
B. Skin infections
C. Cough suppression
D. Hypertension

Correct Answer: C

Q9. Which dosage form is NOT suitable for pediatric use due to alcohol content?
A. Syrup
B. Elixir
C. Linctus
D. Oral drops

Correct Answer: B

Q10. Aromatic waters are
A. Concentrated oils
B. Saturated aqueous solutions of volatile oils
C. Suspensions
D. Emulsions

Correct Answer: B

Q11. Spirits are defined as:
A. Aqueous solutions
B. Alcoholic solutions of volatile substances
C. Suspensions
D. Emulsions

Correct Answer: B

Q12. The major instability in monophasic liquid dosage forms is:
A. Sedimentation
B. Creaming
C. Precipitation
D. Flocculation

Correct Answer: C

Q13. Co-solvency is used to:
A. Reduce viscosity
B. Increase solubility
C. Decrease stability
D. Increase particle size

Correct Answer: B

Q14. Buffers in monophasic systems are used to:
A. Increase sweetness
B. Maintain pH
C. Add color
D. Increase viscosity

Correct Answer: B

Q15. Which artificial sweetener is commonly used in sugar-free syrups?
A. Glucose
B. Sucrose
C. Saccharin sodium
D. Fructose

Correct Answer: C

Q16. Which agent is used to increase viscosity in syrups?
A. Ethanol
B. Glycerin
C. Sodium chloride
D. Citric acid

Correct Answer: B

Q17. Which preservative is commonly used in oral liquid preparations?
A. Sodium chloride
B. Sodium benzoate
C. Talc
D. Starch

Correct Answer: B

Q18. Which is commonly used as a flavoring agent?
A. Talc
B. Menthol
C. Kaolin
D. Starch

Correct Answer: B

Q19. Which of the following is a cosolvent?
A. Ethanol
B. Talc
C. Starch
D. Kaolin

Correct Answer: A

Q20. Dose uniformity in monophasic liquids is ensured because
A. They are heterogeneous
B. Drug is uniformly dissolved
C. They contain solids
D. They require shaking

Correct Answer: B

Q21.

Assertion (A): Syrups are self-preserving.
Reason (R): They contain high sugar concentrations.

A. Both A and R are true; R explains A
B. Both true, but R is not an explanation
C. A true, R false
D. A false, R true

Correct Answer: A

Q22.

Assertion (A): Elixirs are less viscous than syrups.
Reason (R): They contain alcohol.

Correct Answer: A

Q23.

Assertion (A): Monophasic liquids do not require shaking before use.
Reason (R): They are homogeneous systems.

Correct Answer: A

Q24. A pediatric patient requires a liquid formulation of a poorly water-soluble drug. The pharmacist avoids alcohol-containing preparations. Which is the best option?

A. Elixir
B. Syrup with co-solvent
C. Spirit
D. Tincture

Correct Answer: B

Q25. Which of the following monophasic dosage forms contains the highest percentage of alcohol?

A. Syrup
B. Elixir
C. Spirit
D. Aromatic water

Correct Answer: C

Dr Alok Bains

Most commonly repeated questions on

Focus heavily on these:

1. Syrup concentration (66.7%)

2. Self-preservation mechanism

3. Difference: Syrup vs Elixir

4. Co-solvents (ethanol, glycerin)

5. Preservatives (sodium benzoate)

6. Alcohol-related questions (very common trap)

Mock Test on Monophasic Liquid Dosage Forms (50 MCQs)

Time: 45 minutes

🔹 SECTION A: Core Concepts (Q1–15)

Q1. Monophasic liquid dosage forms are:
A. Heterogeneous systems
B. Homogeneous systems
C. Biphasic systems
D. Colloidal systems

Ans: B

Q2. Which is a monophasic system?
A. Suspension
B. Emulsion
C. Elixir
D. Lotion

Ans: C

Q3. Primary solvent used in oral liquids:
A. Ether
B. Water
C. Benzene
D. Acetone

Ans: B

Q4. Monophasic systems ensure dose uniformity because:
A. Drug is suspended
B. Drug is emulsified
C. Drug is dissolved
D. Drug settles

Ans: C

Q5. Which dosage form does NOT require shaking?
A. Suspension
B. Emulsion
C. Syrup
D. Lotion

Ans: C

Q6. Example of monophasic oral liquid:
A. Linctus
B. Suspension
C. Emulsion
D. Paste

Ans: A

Q7. Main disadvantage of monophasic liquids:
A. Sedimentation
B. Creaming
C. Precipitation
D. Flocculation

Ans: C

Q8. Ideal characteristic of a monophasic system:
A. Opaque
B. Clear
C. Biphasic
D. Sedimented

Ans: B

Q9. Which is NOT monophasic?
A. Syrup
B. Elixir
C. Suspension
D. Aromatic water

Ans: C

Q10. Uniform drug distribution occurs due to
A. Phase separation
B. Dissolution
C. Sedimentation
D. Coalescence

Ans: B

Q11. Which is a hydroalcoholic solution?
A. Syrup
B. Elixir
C. Linctus
D. Mixture

Ans: B

Q12. A true solution is:
A. Biphasic
B. Monophasic
C. Colloidal
D. Suspension

Ans: B

Q13. Monophasic liquids are mostly:
A. Oily
B. Clear
C. Solid
D. Turbid

Ans: B

Q14. Solute in a monophasic system is:
A. Dispersed
B. Dissolved
C. Suspended
D. Emulsified

Ans: B

Q15. Stability issues mainly arise due to
A. Sedimentation
B. Dissolution
C. Precipitation
D. Creaming

Ans: C

Q16. Standard sucrose concentration in syrup:
A. 50%
B. 66.7%
C. 80%
D. 90%

Ans: B

Q17. Syrup is self-preserving due to
A. Alcohol
B. Osmotic pressure
C. Oxidation
D. Reduction

Ans: B

Q18. Inversion of sugar involves:
A. Oxidation
B. Hydrolysis
C. Reduction
D. Sublimation

Ans: B

Q19. Elixirs contain:
A. Oil
B. Alcohol
C. Solid
D. Emulsifier

Ans: B

Q20. Elixirs are
A. Viscous
B. Less viscous than syrups
C. Solid
D. Biphasic

Ans: B

Q21. Not suitable for pediatrics:
A. Syrup
B. Elixir
C. Linctus
D. Drops

Ans: B

Q22. Linctus is used for:
A. Fever
B. Pain
C. Cough
D. Infection

Ans: C

Q23. Linctus should be
A. Diluted
B. Swallowed slowly
C. Injected
D. Heated

Ans: B

Q24. Aromatic water contains:
A. Alcohol
B. Volatile oils
C. Proteins
D. Lipids

Ans: B

Q25. Spirits are:
A. Aqueous solutions
B. Alcoholic solutions
C. Suspensions
D. Emulsions

Ans: B

Q26. Highest alcohol content in:
A. Syrup
B. Elixir
C. Spirit
D. Linctus

Ans: C

Q27. Syrup viscosity is due to:
A. Alcohol
B. Sugar
C. Oil
D. Protein

Ans: B

Q28. Artificial sweetener:
A. Glucose
B. Sucrose
C. Saccharin
D. Starch

Ans: C

Q29. Alcohol role:
A. Thickener
B. Solvent
C. Colouring
D. Binder

Ans: B

Q30. Syrups without sugar use:
A. Starch
B. Saccharin
C. Talc
D. Kaolin

Ans: B

Q31. Common preservative:
A. NaCl
B. Sodium benzoate
C. Starch
D. Talc

Ans: B

Q32. Co-solvent example:
A. Talc
B. Ethanol
C. Starch
D. Kaolin

Ans: B

Q33. Viscosity enhancer:
A. Ethanol
B. Glycerin
C. NaCl
D. Acid

Ans: B

Q34. Buffer used for:
A. Taste
B. pH maintenance
C. Colour
D. Preservation

Ans: B

Q35. Flavoring agent:
A. Talc
B. Menthol
C. Starch
D. Kaolin

Ans: B

Q36. Vehicle mainly used:
A. Oil
B. Water
C. Protein
D. Wax

Ans: B

Q37. Co-solvency increases:
A. Viscosity
B. Solubility
C. Colour
D. Density

Ans: B

Q38. Preservatives prevent
A. Dissolution
B. Microbial growth
C. Colour change
D. Odour

Ans: B

Q39. Glycerin acts as:
A. Preservative
B. Co-solvent
C. Both
D. None

Ans: C

Q40. Coloring agent purpose:
A. Stability
B. Appearance
C. Solubility
D. pH

Ans: B

Q41. Precipitation occurs due to:
A. Increase in solubility
B. Decrease in solubility
C. Increase in temperature
D. Mixing

Ans: B

Q42. Best method to dissolve a poorly soluble drug:
A. Sedimentation
B. Co-solvency
C. Filtration
D. Drying

Ans: B

Q43. Alcohol improves solubility by:
A. Oxidation
B. Co-solvency
C. Reduction
D. Hydrolysis

Ans: B

Q44. Phase separation in monophasic indicates
A. Stability
B. Instability
C. Purity
D. Sterility

Ans: B

Q45. Drug precipitation is avoided by:
A. Reducing solvent
B. Maintaining pH
C. Increasing solids
D. Cooling

Ans: B

Q46. Patient needs alcohol-free formulation:
A. Elixir
B. Syrup
C. Spirit
D. Tincture

Ans: B

Q47. Most stable form:
A. Suspension
B. Emulsion
C. Solution
D. Paste

Ans: C

Q48. Uniform dosing advantage due to:
A. Solid dispersion
B. Dissolution
C. Emulsion
D. Suspension

Ans: B

Q49. Hydrotropy helps in:
A. Colouring
B. Solubility
C. Taste
D. Preservation

Ans: B

Q50. Major limitation of monophasic liquids:
A. Poor taste
B. Precipitation
C. Sedimentation
D. Creaming

Ans: B

How to Use This Test

• Score 40+ → Competitive Ready

• Score 30–40 → Revise weak areas

• Below 30 → Rebuild concepts (Syrup + Excipients first)

  Dr Alok Bains