20+ Production Chemist Interview Questions and Answers for Freshers

The interview question covers topics such as Lewis acid, pH, acid and base, organic chemistry, periodic table, chemical formulas, and pH measurement without a pH meter.

• Lewis acid is an electron acceptor, examples include AlCl3 and FeCl3

• pH is a measure of acidity or basicity, with a range of 0-14

• Acids donate H+ ions, bases accept H+ ions

• Organic chemistry deals with carbon-based compounds, examples include ethanol and glucose

• The periodic table organizes elements by atomic numbe...read more

DT stands for Dissolution Test, which is a method used to determine the rate at which a drug substance dissolves in a specific medium.

• DT is an abbreviation for Dissolution Test.

• It is a standard method used in the pharmaceutical industry to evaluate the release of active pharmaceutical ingredients from solid dosage forms.

• The test involves placing a dosage form in a dissolution medium and measuring the amount of drug substance that dissolves over time.

• The results of the test he...read more

The question is unclear and lacks context.

• The interviewer needs to provide more information or rephrase the question.

• It is unclear what is meant by 'grader' and what specific product or material is being referred to.

• Without more information, it is difficult to provide a meaningful answer.

Strong acids and bases are substances that completely dissociate in water to release H+ or OH- ions.

• Strong acids include hydrochloric acid (HCl), sulfuric acid (H2SO4), and nitric acid (HNO3)

• Strong bases include sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide (Ca(OH)2)

A narcotic is a drug that induces sleep or dulls the senses, while a non-analgesic substance does not provide pain relief.

• Narcotics are often used as painkillers or sedatives.

• Examples of narcotics include morphine, codeine, and heroin.

• Non-analgesic substances do not have pain-relieving properties.

• Examples of non-analgesic substances include antibiotics, antacids, and vitamins.

DT time refers to the disintegration time of tablets and capsules.

• DT time is the time it takes for a tablet or capsule to disintegrate in the body.

• It is an important parameter in pharmaceutical manufacturing to ensure proper drug release.

• Different tablets and capsules may have different DT times depending on their formulation and design.

• DT time can be influenced by factors such as the type of excipients used, the compression force during tablet manufacturing, and the coating ...read more

Chlorinated plasticizer is produced by reacting plasticizer with chlorine gas.

• Chlorinated plasticizers are used as flame retardants in plastics.

• The reaction is typically carried out in a batch reactor.

• The process requires careful control of temperature and pressure.

• The final product must be purified to remove any impurities.

• Chlorinated plasticizers can be harmful to human health and the environment.

API stands for Active Pharmaceutical Ingredient. There are two types of API - synthetic and natural.

• API is the main active ingredient in a drug that produces the intended therapeutic effect.

• Synthetic APIs are chemically synthesized in a laboratory.

• Natural APIs are derived from natural sources such as plants, animals, or microorganisms.

• APIs must meet strict quality standards and regulations before they can be used in pharmaceutical products.

PH stands for potential of hydrogen, a measure of the acidity or basicity of a solution.

• PH stands for potential of hydrogen

• It is a measure of the acidity or basicity of a solution

• PH scale ranges from 0 (most acidic) to 14 (most basic)

• Neutral PH is 7

The valency of carbon is 4.

• Carbon typically forms 4 covalent bonds due to having 4 valence electrons.

• This allows carbon to form a wide variety of compounds, including organic molecules.

• Examples of carbon compounds include methane (CH4) and ethylene (C2H4).

I have experience handling a wide range of equipment in the production process.

• I have experience handling various types of reactors, distillation columns, pumps, and filtration systems.

• I am proficient in operating analytical instruments such as spectrophotometers, chromatographs, and titrators.

• I have worked with process control systems like SCADA and PLCs to monitor and control production processes.

My aim is to utilize my skills and knowledge to contribute to the production process and ensure high-quality products are delivered efficiently.

• To optimize production processes and increase efficiency

• To ensure high-quality products are delivered to customers

• To continuously improve and learn new skills to enhance production processes

• To work collaboratively with team members to achieve production goals

Organic chemistry is the study of carbon-based compounds and their properties, reactions, and synthesis.

• It is a branch of chemistry that deals with the structure, properties, and reactions of organic compounds.

• Organic compounds are molecules that contain carbon atoms bonded to hydrogen atoms and other elements such as oxygen, nitrogen, sulfur, and halogens.

• Organic chemistry has many applications in fields such as medicine, agriculture, materials science, and energy production...read more

The question is not relevant to the job of a production chemist.

• This question is not related to the job of a production chemist.

• It is important to stay focused on the job requirements during an interview.

• If asked an irrelevant question, politely redirect the conversation back to the job requirements.

Moisture percentage is a critical parameter for determining the quality of a grade.

• Moisture percentage is the amount of water present in a substance expressed as a percentage of the total weight.

• It is important to control moisture levels in production to ensure product quality and stability.

• Moisture content can affect the physical and chemical properties of a substance, such as its solubility, viscosity, and shelf life.

• For example, a pharmaceutical grade may have a maximum mo...read more

Frability is the tendency of a material to break or crumble easily.

• Frability is a measure of the strength of a material.

• It is often used to describe the quality of tablets or capsules.

• A material with high frability will break or crumble easily, while a material with low frability will be more resistant to breaking.

• Factors that can affect frability include the composition of the material, the manufacturing process, and the storage conditions.

• Frability testing is an important p...read more

The temperature of chlorine depends on its state - gas, liquid or solid.

• Chlorine gas has a boiling point of -34°C and a melting point of -101°C

• Chlorine liquid has a boiling point of -34°C and a freezing point of -101°C

• Chlorine solid has a melting point of -100.98°C

Safety is a top priority in all operations to prevent accidents and injuries.

• Always wear appropriate personal protective equipment (PPE)

• Follow standard operating procedures (SOPs) for handling chemicals

• Regularly inspect and maintain equipment to ensure safe operation

• Participate in safety training and drills to be prepared for emergencies

Molarity is a measure of the concentration of a solution expressed as the number of moles of solute per liter of solution.

• Molarity is calculated by dividing the number of moles of solute by the volume of the solution in liters.

• It is denoted by the symbol 'M'.

• Molarity is commonly used in chemistry to express the concentration of a solution.

• For example, a 1 M solution of sodium chloride contains 1 mole of sodium chloride per liter of solution.

Different dosage forms refer to various ways in which medications can be administered to patients.

• Dosage forms include tablets, capsules, syrups, injections, creams, ointments, and patches.

• Each dosage form has its own advantages and disadvantages in terms of absorption rate, convenience, and patient compliance.

• The choice of dosage form depends on the specific medication, patient preferences, and the condition being treated.

The pressure of chlorine depends on its temperature and volume.

• Chlorine gas is typically stored in pressurized cylinders.

• The pressure of chlorine can be measured using a pressure gauge.

• At room temperature, the pressure of chlorine in a cylinder is typically around 100 psi.

• As the temperature of chlorine increases, its pressure also increases.

• The pressure of chlorine can be calculated using the ideal gas law: PV = nRT.

Testing of grade is crucial to ensure quality and consistency of the product.

• Testing involves analyzing the physical and chemical properties of the product.

• Grade testing is done to ensure that the product meets the required specifications.

• Testing can be done through various methods such as chromatography, spectroscopy, and titration.

• Results of testing are compared to the standard specifications to determine if the product is acceptable.

• Testing is done at various stages of pro...read more

Pharmaceutics is the study of the process of turning a chemical substance into a medication.

• Pharmaceutics involves the design, development, and formulation of drugs.

• It also includes the study of drug delivery systems and drug stability.

• Pharmaceutics plays a crucial role in ensuring the safety and efficacy of medications.

• Examples of pharmaceutics include the development of new drug formulations and the study of drug interactions.

• Pharmaceutics is closely related to pharmacology...read more

Quality of hypo is crucial for accurate and safe chemical production.

• Hypo should be free from impurities and contaminants.

• It should have a consistent concentration of active ingredients.

• The pH level should be within the specified range.

• The hypo should be stored properly to prevent degradation.

• Regular testing and analysis should be conducted to ensure quality.

• Examples of hypo include sodium thiosulfate and ammonium thiosulfate.

Types of reaction

• Chemical reactions can be classified into several types based on the nature of reactants and products

• Some common types of reactions include synthesis, decomposition, combustion, displacement, and redox reactions

• Synthesis reactions combine two or more substances to form a new compound, e.g., A + B → AB

• Decomposition reactions break down a compound into its constituent elements or simpler compounds, e.g., AB → A + B

• Combustion reactions involve the rapid combinat...read more