Merck Group Senior Analyst Interview Questions and Answers

Chromatography is a technique used to separate and analyze mixtures of chemicals based on their properties.

• Chromatography involves passing a mixture through a stationary phase, which separates the components based on their interactions with the stationary phase and mobile phase.

• Different types of chromatography include gas chromatography, liquid chromatography, and thin-layer chromatography.

• It is widely used in various...read more

Analysis is the process of examining data or information to uncover insights, patterns, and trends.

• Analysis involves breaking down complex information into smaller components for better understanding.

• It helps in making informed decisions based on the findings.

• Examples include financial analysis to assess company performance, data analysis to identify trends in customer behavior, and market analysis to understand indust

UV, IR, KF, and polarimeter are analytical instruments used for different types of analysis based on principles of light absorption, emission, and rotation.

• UV (Ultraviolet) spectrophotometer measures the absorption of ultraviolet light by a sample to determine its concentration or purity.

• IR (Infrared) spectrophotometer measures the absorption of infrared light by a sample to identify functional groups in organic compou...read more

Calibration of analytical balance is essential for accurate measurements in analytical chemistry.

• Calibration involves comparing the readings of the balance to known weights.

• Regular calibration ensures accuracy and reliability of measurements.

• Adjustments may be needed if the balance readings deviate from the known weights.

• Calibration should be done using a proper calibration weight and following manufacturer's instructi...read more

PH range is 0-14. Calibration ensures accuracy by adjusting the PH meter to known standards.

• PH range is from 0 to 14, with 7 being neutral

• Acidic solutions have a PH below 7, while alkaline solutions have a PH above 7

• Calibration involves adjusting the PH meter using buffer solutions of known PH values

• Regular calibration ensures accurate PH measurements

UV stands for ultraviolet and its principle involves electromagnetic radiation with a wavelength shorter than that of visible light.

• UV radiation is divided into UVA, UVB, and UVC based on their wavelengths.

• UV radiation is commonly known for its effects on skin, such as sunburn and skin cancer.

• UV radiation is also used for disinfection purposes, such as in water treatment and sterilization.

The pH of water is typically around 7, which is considered neutral.

• The pH scale ranges from 0 to 14, with 7 being neutral, below 7 acidic, and above 7 basic.

• Pure water has a pH of 7, but this can vary due to dissolved minerals or gases.

• Acidic water has a pH below 7, while basic water has a pH above 7.