Rubicon Formulations QC Chemist Interview Questions, Process, and Tips for Freshers

The principles of HPLC, GC, UV, and IR are the fundamental concepts that govern the operation of these analytical techniques.

• HPLC (High-Performance Liquid Chromatography) separates components of a mixture based on their interactions with a stationary phase and a mobile phase.

• GC (Gas Chromatography) separates components of a mixture based on their boiling points and interactions with a stationary phase and a mobile phas...read more

A pH meter is an electronic device used to measure the acidity or alkalinity of a solution.

• pH meter measures the concentration of hydrogen ions in a solution

• The range of a pH meter is typically from 0 to 14

• A pH of 7 is considered neutral, below 7 is acidic, and above 7 is alkaline

• pH meters are commonly used in chemistry, biology, and environmental science

Molecular weights of HCl and sulfuric acid are 36.46 g/mol and 98.08 g/mol respectively.

• HCl has one hydrogen atom and one chlorine atom, with a molecular weight of 36.46 g/mol.

• Sulfuric acid has two hydrogen atoms, one sulfur atom, and four oxygen atoms, with a molecular weight of 98.08 g/mol.

• Molecular weight is calculated by adding the atomic weights of all the atoms in a molecule.

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

• Normality is a measure of the concentration of a solution in terms of the number of equivalents of solute per liter of solution.

• Molarity is a measure of the concentration of a solution in terms of...read more

Melting point is the temperature at which a solid substance turns into a liquid. Boiling point is the temperature at which a liquid substance turns into a gas.

• Melting point is a physical property of a substance

• It is the temperature at which the solid and liquid phases of a substance are in equilibrium

• Boiling point is also a physical property of a substance

• It is the temperature at which the vapor pressure of a liquid eq...read more

Lambert Beers law states that the absorbance of a solution is directly proportional to the concentration of the absorbing species.

• The law is used to determine the concentration of a substance in a solution by measuring its absorbance.

• It assumes that the absorbing species is uniformly distributed throughout the solution.

• The law is often used in spectroscopy and colorimetry.

• The equation for the law is A = εlc, where A is...read more

Titration is a technique used to determine the concentration of a substance in a solution by reacting it with a solution of known concentration.

• Acid-base titration

• Redox titration

• Complexometric titration

• Precipitation titration

• Back titration