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Pharmaceutical Chemistry MCQs Part17

Pharmaceutical Chemistry MCQs

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Pharmaceutical Chemistry MCQ
These are some of the random multiple question answers from Pharmaceutical Chemistry...

1. Sulfonamide metabolism in human body is carried out by:


2. H2 gas is produced, when ______ is added to water:


3. _____ is Anti-hypertensive drug with a Tetrazole ring:


4. ____ blocks H2 receptors:


5. In which of the following drug the pharmacological activity of the drug is associated with a specific optical isomer:


6. Oxidation of Galactose with concentrated H2SO4 yields the:

Gluconic Acid
Glucuronic Acid
Mucic Acid
Saccharic Acid

7. _______ functional group is responsible for the instability of the Aspirin:

Ester Functional Group
Alcohol Functional Group
Ketone Functional Group
Ether Functional Group

8. ______ is responsible for the synthesis of prostaglandins in the human body:

Arachidonic Acid
Stearic Acid
Lignoceric Acid
Myristic Acid

9. Chemical shift in the Nuclear magnetic Resonance (NMR) Spectroscopy is expressed by:

Parts Per Million

10. Which of the following ultraviolet region is used in the drug analysis:

50-200 nm
200-400 nm
400-600 nm
600-800 nm

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What is Humidity?

The simple meaning of humidity is ‘atmospheric moisture’ or ‘amount of water vapor in the atmosphere’.
what is humidity
 Humidity is the amount of water vapors present in the atmosphere (or air). Water vapors are the gaseous state of water and are invisible.
 Humidity can be measured by three ways that are: absolute, relative and specific.
    1.   Absolute humidity is the water content of air in the gram per cubic meter at a given temperature.
     2.   Relative humidity is expressed in percentage, and it measures the current absolute humidity relative to the maximum humidity for that temperature.
    3.   Specific humidity is expressed as the ratio of the mass of the water vapors to the total mass of moist air parcel.

What is Absolute Humidity?

To understand absolute humidity let’s assume you are standing in ground and you collect some air. Now you check that air volume in your chemistry lab and get accurate amount of water vapors in gram. If you collect 1 cubic meter of air volume and it contains 30 gram water vapors than absolute humidity of that ground air is 30 grams per cubic meter. So, now you answer this question i.e. what is absolute humidity.
Absolute humidity (AH) is defined as the total mass (in gram) of water vapor present in a given volume (in cubic meter) of air. Absolute Humidity changes with changes in air temperature and pressure. Absolute humidity is the mass of the water vapors( m H 2 O ) {\displaystyle (m_{H_{2}O})} divided by the volume of the air and water vapor mixture.
AH = m/V
Where, AH = Absolute humidity,
             m = mass of the water vapors( m H 2 O ) {\displaystyle (m_{H_{2}O})},
             V = volume of the air and water vapor mixture.

What is Relative Humidity?

To understand relative humidity let’s assume you are in a building where air absolute humidity is 15 grams per cubic meter at 25 degree Celsius temperature and at 25 degree Celsius temperature highest amount of water vapors is 30 grams per cubic meter (saturated air with water vapors 15 grams per cubic meter). So, now you can calculate relative humidity as follows:
Relative humidity = (15 grams per cubic meter / 30 grams per cubic meter)x100
                            RH = 50%
So, now you answer this question i.e. what is relative humidity.
Relative humidity (RH) is defined as the ratio of the partial pressure of water vapors to the equilibrium vapor pressure of water at a given temperature. If temperature of the atmosphere is lower than relative humidity is higher as cold air (air with low temperature) holds more water vapors (moisture) but, If temperature of the atmosphere is higher than relative humidity is lower as hot air (air with high temperature) holds less water vapors (moisture).

What is Specific Humidity?

To understand specific humidity let’s assume you have an air parcel (air volume or some amount of air) and this parcel contains 10 gram mass of water vapors and total mass of air is 1 kg (including mass of all gases present in air and mass of water vapors) than specific humidity is 10 gram per kilogram. So, now you answer this question i.e. what is specific humidity.
Specific Humidity is defined as the ratio of the mass of water vapors in air to the total mass of the mixture of air and water vapors.
Specific Humidity = mass of water vapor/total mass of air

Difference between Humidity and Relative Humidity

Before going to discuss about “Difference between Humidity and Relative Humidity” we need to understand that what is humidity and what is relative humidity. And to get answer of these two questions just read above paragraph once again if you don’t understand.
Humidity is the amount of water vapors present in the atmosphere (or air). Relative humidity is expressed in percentage, and it measures the current absolute humidity relative to the maximum humidity for that temperature.

Pharma Interview Questions Answers

General Questions Answers asked during interview in pharmaceuticals manufacturing companies
Pharmaceutical companies Interview Questions Answers
Question: What is GMP?
Answer: GMP is a system for ensuring that products are consistently produced and controlled according to quality standards. It is designed to minimize the risks involved in any pharmaceutical production that cannot be eliminated through testing the final product.

Question: What is GDP?
Answer: Good documentation practice GDP is a systematic procedure of preparation, reviewing, approving, issuing, recording, storing and archival of any document.

Question: Importance of Visual inspection?
Answer: Visual inspection is an essential operation in parenteral drug production to ensure the safety of the drug product in its container.

Question: Type of defects?
Answer: Critical, major minor.
 Critical- crack, missing stopper, particles inside container.
Major- Sealing defects, broken container, volume variation.
Minor- stain on container, scratch on container, cosmetic.

Question: Where you perform visual inspection?
Answer: At visual inspection hood in visual inspection area

Question: How you measure light intensity of hood light source?
Answer: Using lux meter.

Question: What is lux ?
Answer: The lux (lx) is the SI unit of illuminance and luminous emittance, measuring luminous flux per unit area. It is equal to one lumen per square metre.

Question: what Lux range used in pharmaceuticals inspection?
Answer: 2000-3750 Lux

Question: what is deviation?
Answer: Departure from standard stablish procedure is known as deviation.

Question: What is Media?
Answer: Substance which promotes growth of microorganisms like bacteria, viruses, fungus.

Extraction of Essential Oil by Steam Distillation of Tulsi (Ocimum Basillicum)

Extraction of Essential Oil by Steam Distillation of Tulsi (Ocimum Basillicum)

Essential oils are insoluble in water and evaporate easily. We can obtain essential oil from plant tissues by distillation or extraction processes. Generally essential oils are obtain from every part of plant like stem, root, leaves, flowers, seed, branches etc. And these essential oils are used in the preparation of drugs, cosmetics and perfumes.
Holi Tulsi Plant
Ocimum Basillicum means Tulsi is an aromatic plant. Ocimum Basillicum is used to obtain essential oil useful for different application. This oil evaporates within 24 hours after applying it to our body. This essential oil helps in cure of digestion problem, strained muscles, headaches and nervous breakdowns. Due to its good medicinal properties and aroma its demand is very high in many countries. A person or company can build a small or large scale industry for the extraction of essential oil from Ocimum Basillicum (Tulsi).

Top 10 General qualitative properties of Ocimum Basillicum essential oil are given below-

essential oil extraction equipment photo1.  Appearance : Transparent fluid
2.  Color : Pale yellow
3.  Fragrance : Ocimum Basillicum’s distinctive flavor and fragrance
4.  Refractive Index on 20°C : 1.51200 to1.51900
5.  Specific Gravity on 25°C : 0.95200 to 0.97300
6.  Optical gyration on 25°C : [-] 8.85º to [-] 11.85º
7.  Well mixed with Hydroxycitronellal
8.  Insoluble in water
9.  Dissolved in paraffin oil

How to obtain oil from holi Tulsi plant?

The extraction of essential oil by steam distillation of ocimum basillicum (Tulsi) is a solid-liquid extraction process. This process completes in following steps-
Flow diagram of steam distilatillation
1.  Collect plant material and dry it if required.
2.  Fill this plant material in distillation vessel.
3.  Add water or solvent (like Ethanol, n-Hexane) in distillation vessel.
4.  Heat the mixture in well-equipped distillation vessel in control environment and controlled temperature, then
5.  Diffusion of essential oil from inside of solid material of plant to its surface occurs, then
6.  Transfer of mass from surface of plant solid material to surrounding liquid occurs, then
7.  This liquid contains essential oil which is obtained by reverse cooler.
8.  Then the collection of above liquid obtained from reverse cooler is put to stand for some time then essential oil come over water, then
9.  We perform layer separation to separate out essential oil from water, then
10.              Store this essential oil in dark, closed vessel for future use.
how to obtain Essential oil by steam distillation ?
The experimental results proves that yield of essential oil of Tulsi (Ocimum-Basillicum)  from only leaves of plant is slightly higher than from the mixture of leaves and stems (means plant crush).



Medicines are chemical or natural products used for healing, diagnosing, treating and improving health. These medicines contain API and Excipient. API is the main active drug which provide therapeutic effect and biologically active.  Excipient is non-active ingredient added in formulation along with API in medicine formulation.
Drugs or Medicines are very high importance as these are life saving, health improving, biologically active, provide therapeutic effect.   Drugs or Medicines provide adverse effect or lead to death if they are not manufactured with care and not manufactured in GMP (Good Manufacturing Practices) environment. Due to high risk, every country has its own regulatory body or regulatory authority. These regulatory bodies or regulatory authorities make and enforce rules and regulations and also prepare and issue guidelines for drugs or medicines manufacturing, licensing, registration, marketing, labeling and packaging of pharmaceutical products like tablets, injections, syrups, eye drops, ointment cream, spray, inhalers, liquid and OSD  (oral solid dosage) etc.
regulatory bodies for pharmaceutical products

List of Main Regulatory Authority around the World

Name of  Regulatory Authority (Full and Short Form of Name)
USFDA – Unites States Food and Drug Administration
MHRA - Medicines and Healthcare Products Regulatory Agency
TGA - Therapeutic Goods Administration (TGA)
CDSCO - Central Drug Standard Control Organization (CDSCO)
TPD – Therapeutic Product Directorate
HPFBI – Health Product & Food Branches Inspectorate
EMA - European Medicines Agency
New Zealand
Medsafe - Medicines and Medical Devices Safety Authority
ANZTPA – New Zealand Therapeutic Product Authority
CFDA - China Food and Drug Administration
South Africa
MCC - Medicines Control Council
Sri Lanka
SPC – State Pharmaceutical Corporation, Ministry of Health
ANVISA - Agencia Nacional de Vigiloncia Sanitaria
MOH - Ministry of Health
DCA – Drug Control Authority

Along with these Regulatory Bodies there are some international organizations also to control these pharmaceutical products like WHO (World Health Organization) and ICH (International Conference on Harmonization).

Media Filling Process

 Media Filling Process in Pharma Industry

Material issue as per FO (Formulation Order)
Material Verification
Media fill process
Material transfer into critical area (sterile lactose)
Liquid media preparation
Resealing of lactose bags
Check pH
Dispensing and blending with intervention simulation
Sterilize the m/c parts, rubber stoppers , dispensing aids, media garments and bin
m/c parts assembling ( filling) , bin , connection on the day of media filling
Media filling parts assembling and liquid media connection to filling m/c
Vial washing and sterilization

Media Checking for Growth

  •  Lactose and liquid media filling stoppering
  •  Sealing, crimping of aluminum seal ( sample for sterilize media for GPT, vials , rubber stoppers , compressed air sterility test / viable commit  monitoring)
  • Eternal vial washing m/c
  • Visual inspection m/c
  •  Online leak testing m/c
  •   Labeled tray with date / time and other details
  • Collect the vials in tray, transfer and handover to micro dept. for incubation through temp. controlled van (truck)

 Preparation of Media

·       Prepare 3% solution of media
·       30gm SCDM (soybean casein digest media) + 1000ml (qs) of wfi (Water For Injection) dissolve in glass carboy.
·       Collect the media sample for pH testing using pH meter and adjust the pH if require.
·       Labeled the media , date of preparation and exp date of media should be 7 days from the date of mfg (Manufacturing Date).
·       Plug the carboy with cotton plug and wrap with breathable cloth sterilize the carboy glass.
·       After sterilization unload the glass carboy in cooling zone and store under UAF on SS table (Stainless Steel Table).
·       Transfer the media carboy to vial filling room through the UAF mounted mobile trolley.
·       End of operation collect the media solution from each carboy and send to micro lab for GPT.
·       Incubate the media in micro lab for 7 days at 20C to 25C followed by 7 days at 30C to 35C.
·       Record the observation in microbiology validation green sheet.


          Growth Promotion Test, to insure that the liquid media used for the process simulation test is capable of microbial growth promotion.

Lactose Powder

                              Sterilized by gamma radiation method Lactose transfer in critical area
·       Gamma radiation sterilized powder of lactose => qc (quality Control) released => clean with lint free wipe
·       Outer carton and polybag removed in material transfer airlock
·       Pack sanitized and enter into pass box
·       Critical area
·       Lactose bags shall open inside the RABS (restricted access barrier system)

Dispensing Procedure

·       Lactose passes through mesh 36 over the ss-bin using the spoon
·       Load the bin on mixing column
·       Blend for 30 min
·       Unload the bin and transfer it into RABS
·       Remaining quantity also passed by same procedure
·       Quadruplet sampling carried out from 10 location (don’t take out sample only simulate)
·       Simulate pulled sample collection from 3 location (twice) for bulk analysis
·       Transfer the bulk containing lactose for vial filling operation

Assembling Vial Filling m/c Parts

·       Assembled the liquid media filling parts ( peristaltic pump with needles and silicon hose )
·       SS bin containing sterilize lactose
·       Upload it with lifting column
·       SS bin connect to powder hopper chute of vial filling m/c
·       Assembling the pre end post air flushing assembly
·       Insure that vials are flushed with sterile ( filtered ) compressed air during the filling process
·       30/40 ml vial – 50ml volume ( 250mg lactose) filled
·       100ml vial – 10ml volume ( 500mg lactose) filled
·       Minimum vial quantity to be put for incubation in each media fill operation shall not be less than 10,300 vials ( applicable for all pack sizes )
·       Record the collection time of media filled vials on each tray / boxes and affix the label

USE of Sterilize Lactose

·       Flow ability through the hopper and dosing wheel is similar to the product manufacture
·       It does not inhibit the growth of microbes and has growth promotion activity
·       Soluble in media and water
·       Sterilized by gamma radiation

Incubation Period

·       7 days ( bacterial growth ) – 20 to 25C
·       7 days ( viral growth ) – 30 to 35
·       Total 14 days incubation.
         1.  30/40ml vials 5500 to 6500 vials/hrs., lactose filled using single dosing mechanism      
            2. 100ml vials 2500 to 3500 double dosing wheel mechanism

Post Media-fill Activity

·       Clean and sanitize the equipment (used for media fill activity)
·       The final rinse sample (from product contact part) should be analyses for TOC
·       The TOC in the rinse water sample shall not exceed 500ppb
Tubular vial
Bromobutyle rubber stopper
Flip off

Media-fill Failure

·       In case of media fill failure respective procedure of OOS ( out of specification) in microbiological analysis , investigation , deviation management shall be followed
·       Characterization of microorganism up to species level shall be carried out to find out the sources of contamination
·       Environmental records for manufacturing and testing area for temp. RH , DP and non-viable air born particle counts
·       Microbiological monitoring, reports of manufacturing and testing area for settling plate air sampling, surface monitoring and personnel monitoring.

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