Zydus Lifesciences QC Executive Interview Questions and Answers for Experienced

Q1. What are the definitions and differences between molarity, molality, and normality?
Ans. 
Molarity, molality, and normality are all concentration units used in chemistry.
• Molarity is the number of moles of solute per liter of solution.

• Molality is the number of moles of solute per kilogram of solvent.

• Normality is the number of equivalents of solute per liter of solution.

• Molarity is temperature dependent, while molality is temperature independent.

• Normality is used in acid-base reactions to measure the concentr
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Q1. Explain hplc process?
Ans. 
HPLC process is a chromatographic technique used to separate, identify, and quantify components in a mixture.
• HPLC stands for High Performance Liquid Chromatography.

• It involves passing a liquid sample through a column filled with a stationary phase, where different components interact differently and get separated.

• The separated components are detected and quantified based on their retention times.

• HPLC is commonly used i...read more
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Q2. Explain gc process?
Ans. 
GC process stands for Gas Chromatography process used for separating and analyzing compounds in a mixture.
• GC process involves injecting a sample into a heated inlet, where it vaporizes.

• The vaporized sample is carried by an inert gas through a column packed with a stationary phase.

• Different compounds in the sample interact differently with the stationary phase, leading to separation based on their properties.

• The separat...read more
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Q1. What is oos and ooT
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OOS stands for Out of Specification and OOT stands for Out of Trend in the context of quality control.
• OOS refers to a result that falls outside the specifications or acceptance criteria set for a product.

• OOT refers to a result that shows a trend of deviation from the expected values over time.

• Both OOS and OOT results require investigation to determine the root cause and potential impact on product quality.

• Examples: OOS...read more
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Q2. HPLC operations
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Q1. Asking questions about the candidate's education.
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Q2. Check the previous record and behavior
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I always maintain a record of my work and behavior to ensure accountability and improvement.
• I keep a log of my daily tasks and accomplishments

• I regularly seek feedback from my supervisor and colleagues

• I take responsibility for my mistakes and work to correct them

• I strive to maintain a positive and professional attitude at all times
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Q1. Uv visible spectroscopy calibration ph calibration validation AAS instrument viscometer
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