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I applied via LinkedIn and was interviewed before Apr 2023. There was 1 interview round.
HPLC is used for separating compounds in liquid phase, while GC is used for separating compounds in gas phase.
HPLC stands for High Performance Liquid Chromatography, while GC stands for Gas Chromatography.
HPLC is used for analyzing compounds that are heat-sensitive or non-volatile, while GC is used for volatile compounds.
HPLC typically uses a liquid mobile phase and a solid stationary phase, while GC uses a gas mobile ...
Organic reaction mechanisms involve step-by-step processes by which organic molecules undergo chemical transformations.
Nucleophilic substitution: involves the attack of a nucleophile on an electrophilic carbon atom, leading to the substitution of one group with another.
Electrophilic addition: occurs when an electrophile reacts with a nucleophile to form a new bond, typically seen in alkene reactions.
Elimination: involv...
NMR spectroscopy is suitable for organic reactions due to its ability to provide detailed structural information.
NMR spectroscopy is commonly used to analyze organic compounds and reactions.
It can provide information on the connectivity of atoms, functional groups, and stereochemistry.
Examples of NMR techniques include 1H-NMR and 13C-NMR.
NMR spectroscopy is non-destructive and can be used to monitor reactions in real-t
The IR value for carbonyl compounds is typically around 1700-1750 cm^-1, while other functional groups have characteristic IR values.
Carbonyl compounds typically show a strong absorption band around 1700-1750 cm^-1 in the IR spectrum.
Alcohols usually have a broad peak around 3200-3600 cm^-1 due to O-H stretching.
Amines exhibit N-H stretching vibrations around 3300-3500 cm^-1.
Alkenes show C=C stretching vibrations aroun...
I applied via Referral and was interviewed in Apr 2022. There was 1 interview round.
Chromatography is a technique used to separate and analyze mixtures of chemicals.
Types include gas chromatography, liquid chromatography, ion exchange chromatography, and affinity chromatography.
Gas chromatography separates volatile compounds based on their boiling points.
Liquid chromatography separates compounds based on their interactions with a stationary phase and a mobile phase.
Ion exchange chromatography separate...
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I applied via Walk-in and was interviewed before Feb 2020. There were 4 interview rounds.
posted on 23 Sep 2021
I applied via Company Website and was interviewed before Sep 2020. There were 3 interview rounds.
The role of a ligand in Suzuki coupling reaction is to facilitate the formation of a stable complex between the catalyst and the reactants.
A ligand coordinates with the catalyst metal center, enhancing its reactivity and selectivity.
It helps in stabilizing the transition state and lowering the activation energy of the reaction.
Different ligands can influence the reaction rate and product distribution.
Common ligands use...
I am well-versed with the mechanism of the Grignard reaction.
Grignard reaction involves the addition of an organomagnesium halide to a carbonyl compound.
It is a nucleophilic addition reaction.
The reaction is highly useful in organic synthesis, especially for the formation of carbon-carbon bonds.
Examples include the synthesis of alcohols, carboxylic acids, and ketones.
The reaction is named after French chemist Victor Gr
I applied via Walk-in and was interviewed before Dec 2018. There were 3 interview rounds.
I applied via Walk-in and was interviewed before Jan 2020. There was 1 interview round.
Mass spectrometry is a technique used to identify and quantify molecules based on their mass-to-charge ratio.
Electrospray ionization (ESI)
Matrix-assisted laser desorption/ionization (MALDI)
Gas chromatography-mass spectrometry (GC-MS)
Liquid chromatography-mass spectrometry (LC-MS)
Time-of-flight mass spectrometry (TOF-MS)
UV spectrometry is a technique that measures the absorption or transmission of ultraviolet light by a sample.
UV spectrometry is based on the principle that different molecules absorb UV light at specific wavelengths.
It is commonly used in analytical chemistry to determine the concentration of a substance in a sample.
UV spectrometry can be used to analyze the purity of a compound or identify unknown substances.
The instr...
To prepare 0.1 N HCl and NaOH, you need to calculate the required amount of the respective chemicals and dilute them in water.
Calculate the molar mass of HCl and NaOH
Determine the volume of solution needed
Use the formula: Normality (N) = (Number of equivalents / Volume of solution in liters)
For 0.1 N HCl, calculate the number of equivalents of HCl and dilute it to the desired volume
For NaOH, calculate the number of equ...
Quality assurance is the process of ensuring that products or services meet the desired level of quality.
It involves establishing standards and procedures to ensure that products or services meet those standards.
It includes monitoring and evaluating the quality of products or services to identify areas for improvement.
It also involves taking corrective action when necessary to address quality issues.
Examples include co...
Recall definitions
Recall: the ability to retrieve information from memory
Definition: a statement that explains the meaning of a word or phrase
Research: the systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions
Associate: a person who works with others towards a common goal
Hypothesis: a proposed explanation for a phenomenon
Experiment: a scientific procedure...
The type of HPLC used depends on the specific research requirements and objectives.
There are several types of HPLC systems available, including reverse phase, normal phase, ion exchange, size exclusion, and affinity chromatography.
The choice of HPLC system depends on the properties of the analyte, such as polarity, size, charge, and affinity.
For example, reverse phase HPLC is commonly used for the separation of nonpola...
UV detectors and HPLC detectors are used in research to analyze and quantify substances.
UV detectors are commonly used in UV-visible spectroscopy to measure the absorption of light by a sample at different wavelengths.
HPLC detectors are used in high-performance liquid chromatography to detect and quantify the components of a mixture.
Common types of UV detectors include diode array detectors (DAD) and photodiode array d...
Matrix in MALDI MS system is a substance used to assist in ionization of the sample for analysis.
Matrix is a substance that absorbs energy from the laser and transfers it to the sample, causing ionization.
The choice of matrix depends on the type of sample being analyzed.
Common matrices include alpha-cyano-4-hydroxycinnamic acid (CHCA) and sinapinic acid (SA).
I applied via Pharma wisdom and was interviewed before Apr 2020. There were 3 interview rounds.
The challenge test of a machine is a test to determine its capabilities and limitations.
The challenge test should be designed to push the machine to its limits.
It should be conducted in a controlled environment to ensure safety.
Examples of challenge tests include stress tests, endurance tests, and performance tests.
The results of the challenge test can be used to improve the machine's design and performance.
I applied via Company Website and was interviewed before Nov 2020. There was 1 interview round.
Water solid compound is ice.
Water solid compound is formed when water freezes.
The solid form of water is known as ice.
Ice has a crystalline structure and a lower density than liquid water.
Ice can exist in different forms, such as ice cubes, snowflakes, or glaciers.
Compounds that can be analyzed using HPLC, GC, and MC.
Polar compounds are suitable for HPLC analysis.
Non-polar compounds are suitable for GC analysis.
Compounds that are thermally stable can be analyzed using MC.
Examples of compounds suitable for all three techniques include caffeine and aspirin.
I applied via Walk-in and was interviewed before Sep 2020. There were 4 interview rounds.
FFS machine stands for Form-Fill-Seal machine, which is a packaging machine used to form, fill, and seal products in various industries.
FFS machine is commonly used in industries such as food and beverage, pharmaceuticals, and cosmetics.
It is an automated machine that can produce packaging materials on-site.
The machine forms a package from a flat roll of film, fills it with the product, and then seals it.
FFS machines c...
Kaizen is a Japanese term for continuous improvement. It involves making small, incremental changes to improve processes and systems.
Kaizen is a philosophy that focuses on continuous improvement in all aspects of an organization.
It involves identifying areas for improvement, making small changes, and then evaluating the results.
Kaizen can be applied to any process or system, from manufacturing to healthcare.
Examples of...
Transformers are electrical devices that transfer energy between two or more circuits through electromagnetic induction.
Transformers are used to increase or decrease voltage levels in electrical circuits
They consist of two coils of wire wrapped around a magnetic core
The primary coil is connected to the input voltage and the secondary coil to the output load
Step-up transformers increase voltage while step-down transform...
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