Alkem Laboratories Apprentice Interview Questions, Process, and Tips

pH is a measure of the acidity or alkalinity of a solution. It indicates the concentration of hydrogen ions in the solution.

• pH is measured on a scale from 0 to 14.

• A pH value below 7 indicates acidity, while a value above 7 indicates alkalinity.

• A pH of 7 is considered neutral.

• Each unit change in pH represents a tenfold change in acidity or alkalinity.

• For example, a solution with a pH of 3 is ten times more acidic than a

Normality refers to the state of being typical or usual, conforming to a standard or norm.

• Normality is subjective and varies across cultures and contexts.

• It can refer to physical, mental, or social states.

• For example, normal body temperature is around 98.6°F, normal behavior in a classroom is to listen to the teacher, and normal social interaction involves respecting others' boundaries.

• Abnormality can be defined as dev...read more

Chromatography is a technique used to separate and analyze mixtures of chemicals.

• It involves a stationary phase and a mobile phase.

• The mixture is passed through the stationary phase, which separates the components based on their physical and chemical properties.

• Examples include gas chromatography, liquid chromatography, and paper chromatography.

To prepare 1N H2SO4 solution, add 49 g of concentrated H2SO4 to 1 L of distilled water.

• Measure 49 g of concentrated H2SO4

• Add it to 1 L of distilled water

• Stir the solution until the H2SO4 is completely dissolved

• Check the pH of the solution to ensure it is 1N