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Pharmaceutical Chemistry, QA & Drug Laws (Pharmacy) Solved Questions & Notes (2026) - Apex Rankers

Pharmacy & Clinical Sciences > Pharmacy > Pharmaceutical Chemistry, QA & Drug Laws

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Pharmaceutical Chemistry, QA & Drug Laws

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Q. 1 Pharmacy
Difficulty: Easy (1 Mark)
What physical law forms the mathematical basis for quantitative UV-Visible spectrophotometric analysis of pharmaceutical compounds?
A
Beer-Lambert Law: A = epsilon * b * c
✓ Correct
B
Bragg's Law: n * lambda = 2 * d * sin(theta)
C
Henry's Law
D
Raoult's Law
💡 Step-by-Step Explanation & Concept Rationale
The Beer-Lambert law states that absorbance (A) is directly proportional to molar absorptivity (epsilon), path length of the cuvette (b, standardly 1 cm), and analyte concentration (c): A = epsilon * b * c.
Q. 2 Pharmacy
Difficulty: Easy (1 Mark)
In UV-Visible spectroscopy, what is a 'Bathochromic Shift'?
A
A shift of the absorption maximum (lambda_max) toward a longer wavelength (Red shift)
✓ Correct
B
A shift of lambda_max toward a shorter wavelength (Blue shift)
C
An increase in absorption intensity (Hyperchromic effect)
D
A decrease in absorption intensity (Hypochromic effect)
💡 Step-by-Step Explanation & Concept Rationale
A bathochromic shift (red shift) moves the absorption band to longer wavelengths (lower energy), typically caused by solvent polarity changes or conjugation. A hypsochromic shift (blue shift) moves it to shorter wavelengths.
Q. 3 Pharmacy
Difficulty: Easy (1 Mark)
In Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC), what are the standard characteristics of the stationary phase and mobile phase?
A
Non-polar stationary phase (e.g., C18 octadecylsilane) and polar mobile phase (e.g., water/acetonitrile/methanol)
✓ Correct
B
Polar stationary phase (silica) and non-polar organic mobile phase (hexane)
C
Cation-exchange resin with acidic buffer
D
Porous gel beads with gas mobile phase
💡 Step-by-Step Explanation & Concept Rationale
In reversed-phase HPLC (RP-HPLC), the stationary phase is non-polar (hydrophobic alkyl chains such as C18 or C8 bonded to silica) and the mobile phase is polar (aqueous buffer mixed with water-miscible organic modifiers like methanol or acetonitrile). More polar solutes elute first.
Q. 4 Pharmacy
Difficulty: Medium (1 Mark)
According to pharmacopeial chromatography standards, what is the minimum chromatographic resolution (Rs) required between two adjacent peaks for complete baseline separation?
A
Rs >= 1.5
✓ Correct
B
Rs >= 0.5
C
Rs >= 0.8
D
Rs >= 5.0
💡 Step-by-Step Explanation & Concept Rationale
Chromatographic resolution (Rs) measures peak separation: Rs = 2*(t2 - t1)/(w1 + w2). An Rs value of 1.5 or greater guarantees baseline separation with less than 0.1% peak overlap.
Q. 5 Pharmacy
Difficulty: Medium (1 Mark)
In HPLC system suitability testing, what is the acceptable upper limit for the Peak Tailing Factor (T)?
A
Not more than 1.5 to 2.0 (T <= 2.0)
✓ Correct
B
Exactly 0.1
C
Greater than 5.0
D
Not less than 3.0
💡 Step-by-Step Explanation & Concept Rationale
Peak symmetry or tailing factor (T = W0.05 / 2f) should ideally be 1.0 (symmetric Gaussian peak). Pharmacopeias generally specify that T must not exceed 1.5 to 2.0 for acceptable quantitation.
Q. 6 Pharmacy
Difficulty: Easy (1 Mark)
Which analytical technique is universally recognized as the official pharmacopeial standard for the specific determination of trace residual water content in pharmaceutical powders and raw materials?
A
Karl Fischer Volumetric/Coulometric Titration
✓ Correct
B
Loss on Drying (LOD) in a convection oven
C
Thin Layer Chromatography
D
UV Spectrophotometry
💡 Step-by-Step Explanation & Concept Rationale
Karl Fischer titration uses a specific reaction between water, sulfur dioxide, iodine, and an organic base (imidazole/pyridine) in methanol, reacting specifically with water molecules rather than general volatile matter measured by LOD.
Q. 7 Pharmacy
Difficulty: Easy (1 Mark)
In Thin Layer Chromatography (TLC), how is the Retention Factor (Rf) calculated?
A
Rf = Distance moved by solute / Distance moved by solvent front
✓ Correct
B
Rf = Distance moved by solvent front / Distance moved by solute
C
Rf = Solute concentration * Solvent volume
D
Rf = Retention time on column / Flow rate
💡 Step-by-Step Explanation & Concept Rationale
Rf is the ratio of the migration distance of the center of the solute spot to the migration distance of the mobile phase solvent front from the origin line (Rf values always range between 0 and 1).
Q. 8 Pharmacy
Difficulty: Medium (1 Mark)
Under ICH Q2(R1) validation guidelines, what formula defines the Limit of Detection (LOD) based on the standard deviation of response (sigma) and the slope of the calibration curve (S)?
A
LOD = 3.3 * sigma / S
✓ Correct
B
LOD = 10 * sigma / S
C
LOD = sigma / (3.3 * S)
D
LOD = 2 * sigma * S
💡 Step-by-Step Explanation & Concept Rationale
ICH Q2(R1) specifies that the Limit of Detection is LOD = 3.3 * sigma / S (signal-to-noise ratio ~3:1). The Limit of Quantitation is LOQ = 10 * sigma / S (signal-to-noise ratio ~10:1).
Q. 9 Pharmacy
Difficulty: Easy (1 Mark)
What is the official title of the primary regulatory statute governing the import, export, manufacture, storage, distribution, and sale of therapeutic goods in Pakistan?
A
The Drugs Act, 1976 (Act No. XXXI of 1976)
✓ Correct
B
The Pharmacy Act, 1967
C
The Dangerous Drugs Act, 1930
D
The Medical Devices Act, 2015
💡 Step-by-Step Explanation & Concept Rationale
The Drugs Act 1976 is the primary federal act regulating drugs across Pakistan, enacted to regulate import, export, manufacture, storage, distribution, and sale of drugs.
Q. 10 Pharmacy
Difficulty: Easy (1 Mark)
Under the Drugs Act 1976, which statutory authority was created in 2012 by an Act of Parliament to provide effective coordination and enforcement of the Drugs Act across Pakistan?
A
Drug Regulatory Authority of Pakistan (DRAP)
✓ Correct
B
National Institute of Health (NIH)
C
Pakistan Medical Commission (PMC)
D
Pakistan Council of Scientific and Industrial Research (PCSIR)
💡 Step-by-Step Explanation & Concept Rationale
The DRAP Act 2012 established the Drug Regulatory Authority of Pakistan (DRAP) as an autonomous federal body to regulate therapeutic goods, licensing, registration, quality assurance, pricing, and clinical trials.
Q. 11 Pharmacy
Difficulty: Medium (1 Mark)
Under Section 3 of the Drugs Act 1976, what is defined as a 'Spurious Drug'?
A
A drug which is not what it purports to be, or which bears a label imitating another drug, or which conceals the true manufacturer name
✓ Correct
B
A drug that has lost 5% potency during storage
C
A drug packaged without an outer cardboard carton
D
An unapproved cosmetic shampoo
💡 Step-by-Step Explanation & Concept Rationale
Under Section 3(zb) of Drugs Act 1976, a spurious drug is one which purports to be the product of a manufacturer other than the actual manufacturer, or bears a fictitious manufacturer name, or is an imitation of another drug.
Q. 12 Pharmacy
Difficulty: Medium (1 Mark)
Under the Drugs Act 1976, what is defined as an 'Adulterated Drug'?
A
A drug containing any filthy, putrid, decomposed substance, or packed under unsanitary conditions, or containing toxic impurities
✓ Correct
B
A drug manufactured with an authentic registration number
C
A drug sold at a discounted wholesale price
D
A drug dispensed in a child-resistant cap
💡 Step-by-Step Explanation & Concept Rationale
Section 3(a) defines an adulterated drug as one consisting in whole or in part of filthy, putrid, or decomposed substances, or produced/prepared/packed under unsanitary conditions whereby it may have been contaminated with filth.
Q. 13 Pharmacy
Difficulty: Medium (1 Mark)
Under the Drugs Act 1976, what is defined as a 'Misbranded Drug'?
A
A drug that is colored, coated, or polished to conceal damage, or whose label is false or misleading in any particular
✓ Correct
B
A drug sold under its generic international non-proprietary name
C
A drug with an approved batch number
D
A formulation manufactured in a cGMP-certified facility
💡 Step-by-Step Explanation & Concept Rationale
Section 3(v) defines misbranded drugs as those with false or misleading labeling, lacking required warnings, or colored/powdered/coated to conceal inferior quality or decay.
Q. 14 Pharmacy
Difficulty: Easy (1 Mark)
When a Drug Inspector draws a sample of a drug under Section 19 of the Drugs Act 1976, into how many distinct portions must the sample be divided and sealed?
A
Four (4) portions
✓ Correct
B
Two (2) portions
C
Three (3) portions
D
Five (5) portions
💡 Step-by-Step Explanation & Concept Rationale
Under Section 19(3) of Drugs Act 1976, the Drug Inspector must divide the sample into 4 portions: one given to the person from whom it was seized, one sent to the Government Analyst, one sent to the Court or PQCB/FQCB, and one retained by the Inspector.
Q. 15 Pharmacy
Difficulty: Medium (1 Mark)
On which statutory form must a Government Analyst issue the test and analysis report of a drug sample submitted by a Drug Inspector under the Drugs (Licensing, Registering & Advertising) Rules?
A
Form 4 (or Form 5)
✓ Correct
B
Form 1
C
Form 10
D
Form 24
💡 Step-by-Step Explanation & Concept Rationale
The Government Analyst submits reports on Form 4 (for testing of samples taken under Section 19) or Form 5, stating the result of analysis and whether the sample complies with pharmacopeial standards.
Q. 16 Pharmacy
Difficulty: Medium (1 Mark)
Under Section 31 of the Drugs Act 1976, who presides as Chairman over a statutory Drug Court in Pakistan?
A
A person who is, or is qualified to be, a Judge of a High Court
✓ Correct
B
A Deputy Commissioner of the district
C
A senior hospital pharmacist
D
The Director General of Health
💡 Step-by-Step Explanation & Concept Rationale
Section 31 specifies that a Drug Court consists of a Chairman, being a person who is, or is qualified to be, a Judge of a High Court, and two members who are experts in medical sciences or pharmaceutical chemistry.
Q. 17 Pharmacy
Difficulty: Medium (1 Mark)
What is the composition of the members of a Drug Court assisting the Chairman under the Drugs Act 1976?
A
Two members, of whom at least one is a person having expert knowledge of medical sciences or pharmaceutical chemistry
✓ Correct
B
Three executive magistrates
C
Two police superintendents
D
Five commercial pharmaceutical distributors
💡 Step-by-Step Explanation & Concept Rationale
The Federal or Provincial Government establishes Drug Courts consisting of a Chairman (High Court Judge or qualified) and two members with expert knowledge in pharmaceutical chemistry or medicine.
Q. 18 Pharmacy
Difficulty: Medium (1 Mark)
Before prosecuting an alleged offender in a Drug Court for an offense under the Drugs Act 1976 in a province, whose prior written permission/sanction is legally mandatory?
A
The Provincial Quality Control Board (PQCB)
✓ Correct
B
The Inspector General of Police
C
The Chief Minister of the Province
D
The District Sessions Judge
💡 Step-by-Step Explanation & Concept Rationale
Drug Inspectors cannot initiate prosecution in the Drug Court on their own initiative; they must present the case and test reports to the PQCB (or FQCB for federal cases), which evaluates the evidence and grants sanction for prosecution.
Q. 19 Pharmacy
Difficulty: Medium (1 Mark)
Under Section 27 of the Drugs Act 1976, what is the maximum penalty for manufacturing or selling a 'Spurious Drug' or a drug without a valid manufacturing license?
A
Imprisonment for a term which may extend to seven years (or up to 10-14 years for aggravated cases) and a fine up to one million rupees
✓ Correct
B
Simple fine of 1,000 rupees only
C
One week community service
D
30 days suspension of driving license
💡 Step-by-Step Explanation & Concept Rationale
Manufacturing, importing, or selling spurious or unlicensed drugs carries severe punishment under Section 27: imprisonment for 3 to 10 years (or life imprisonment / 14 years under amended provincial statutes) and substantial fines.
Q. 20 Pharmacy
Difficulty: Easy (1 Mark)
Under the Pharmacy Act 1967 of Pakistan, which professional register is maintained by the Provincial Pharmacy Council for qualified graduate pharmacists holding a B-Pharmacy or Pharm-D degree?
A
Register 'A'
✓ Correct
B
Register 'B'
C
Register 'C'
D
Register 'D'
💡 Step-by-Step Explanation & Concept Rationale
Under the Pharmacy Act 1967, Register 'A' is maintained for qualified graduate pharmacists holding a recognized university degree (Pharm-D / B-Pharmacy). Register 'B' is for pharmacy technicians/assistant pharmacists (diploma holders).
Q. 21 Pharmacy
Difficulty: Easy (1 Mark)
What is the primary role of the Central Licensing Board (CLB) established under the Drugs Act 1976 and DRAP Act 2012?
A
Granting, renewing, suspending, or canceling pharmaceutical manufacturing licenses
✓ Correct
B
Registering medical doctors with PMDC
C
Fixing electricity tariffs for factories
D
Issuing commercial driving permits
💡 Step-by-Step Explanation & Concept Rationale
The Central Licensing Board (CLB) within DRAP is responsible for issuing, renewing, amending, suspending, or canceling licenses to manufacture drugs in Pakistan.
Q. 22 Pharmacy
Difficulty: Easy (1 Mark)
What is the primary function of the Registration Board under DRAP?
A
Evaluating applications and granting registrations for finished drug formulations and new therapeutic molecules
✓ Correct
B
Inspecting community pharmacy shops for price tags
C
Registering trade unions in chemical plants
D
Issuing patents for chemical reagents
💡 Step-by-Step Explanation & Concept Rationale
The Registration Board evaluates pharmaceutical dossiers (safety, efficacy, quality, stability) and grants product registration numbers (D.R. No.) required to market any drug product in Pakistan.
Q. 23 Pharmacy
Difficulty: Easy (1 Mark)
In cGMP, what does the acronym 'BMR' stand for, and why is it essential?
A
Batch Manufacturing Record; a complete step-by-step documented history of the production and testing of a specific batch
✓ Correct
B
Biological Metric Registry
C
Baseline Mortality Rate
D
Bulk Material Receipt
💡 Step-by-Step Explanation & Concept Rationale
The Batch Manufacturing Record (BMR) provides a traceable, contemporaneous record of every raw material, operator, equipment, process parameter, in-process check, and yield for each manufactured lot.
Q. 24 Pharmacy
Difficulty: Easy (1 Mark)
What is the purpose of a 'CAPA' system in pharmaceutical Quality Assurance?
A
Corrective and Preventive Actions; investigating root causes of non-conformances to eliminate reoccurrence and prevent potential issues
✓ Correct
B
Central Administrative Patent Application
C
Certified Analytical Purity Assay
D
Chemical Analysis of Pure Active ingredients
💡 Step-by-Step Explanation & Concept Rationale
CAPA is a core element of the pharmaceutical quality system (ICH Q10) that investigates deviations, out-of-specification results, and product complaints to implement corrective actions and preventive measures.
Q. 25 Pharmacy
Difficulty: Medium (1 Mark)
In pharmaceutical equipment and facility qualification, what are the four sequential stages of qualification?
A
Design Qualification (DQ), Installation Qualification (IQ), Operational Qualification (OQ), Performance Qualification (PQ)
✓ Correct
B
Inspection, Maintenance, Repair, Disposal
C
Sampling, Testing, Approving, Rejecting
D
Calibration, Titration, Synthesis, Packaging
💡 Step-by-Step Explanation & Concept Rationale
The four standard qualification phases are: Design Qualification (DQ - specifications verify user requirements), IQ (correct installation), OQ (operates within operating ranges), and PQ (consistent performance under production conditions).
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