Leben Life Sciences Interview Questions and Answers

Q1. How many types of hplc
Ans. 
There are several types of HPLC (High Performance Liquid Chromatography) used in analytical chemistry.
• Reverse Phase HPLC

• Normal Phase HPLC

• Ion Exchange HPLC

• Size Exclusion HPLC

• Affinity HPLC

• Chiral HPLC

• Hydrophilic Interaction Chromatography (HILIC)

• Hydrophobic Interaction Chromatography (HIC)

• Reversed-Phase Ion Pairing Chromatography (RP-IPC)

• Fast Protein Liquid Chromatography (FPLC)
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Q2. Which column is used in hplc
Ans. 
The column used in HPLC is a crucial component that separates and analyzes compounds in a liquid sample.
• The column in HPLC is packed with stationary phase particles that interact with the sample components.

• Different columns with varying properties are used depending on the analytes and separation requirements.

• Common types of columns include reverse phase, normal phase, ion exchange, and size exclusion columns.

• For examp...read more
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Q3. Why use the HPLC
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HPLC is used in chemistry to separate, identify, and quantify components of a mixture.
• HPLC is a powerful analytical technique used in various industries such as pharmaceuticals, food and beverage, environmental analysis, and forensic science.

• It is used to separate and purify complex mixtures into individual components.

• HPLC can identify and quantify the amount of each component present in a sample.

• It is highly sensitive...read more
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Q1. First thing to do when you go to interview is introduce yourself in polite language. After that they Ask you basic knowledge regarding your background from which you belong(B.Sc,M.Sc)
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Q2. 1)what are the pH indicator. 2)what type of name reaction. 3) who differentiate acid and bases.
Ans. 
pH indicators, name reactions, and acid-base differentiation are important topics in chemistry.
• pH indicators are substances that change color depending on the pH of the solution they are in, such as litmus paper or phenolphthalein.

• Name reactions are specific chemical reactions that have been named after their discoverers or developers, such as the Grignard reaction or the Friedel-Crafts reaction.

• Acid-base differentiati...read more
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Q1. What are your salary expectations?
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Q1. Process of cleaning
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Cleaning involves removing dirt, contaminants, and impurities from surfaces or materials using various methods and agents.
• Identify the type of surface or material to be cleaned (e.g., glass, metal, fabric).

• Choose appropriate cleaning agents (e.g., detergents, solvents, disinfectants).

• Use mechanical action (e.g., scrubbing, wiping) to enhance cleaning effectiveness.

• Rinse thoroughly to remove any residues of cleaning age...read more
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Q2. Equipment moc
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Q3. 3 types cleaning
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Q1. What are your salary expectations?
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Q2. What are your strengths and weaknesses?
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Q3. Where do you see yourself in 5 years?
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Q4. Tell me about yourself.
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Q5. Chemistry formulas, reactions
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Q1. Say about your self.
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Q1. About your self introduction
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Q2. Communication skills
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Q3. Chemistry related questions
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Q4. If you ready to join immediately
Ans. 
Yes, I am ready to join immediately.
• I am excited to start working right away

• I have completed all necessary preparations to begin immediately

• I am available to start as soon as possible
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