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Addverb Technologies Interview Questions and Answers

Updated 5 Feb 2024

Q1. What is karl fisher reaction and how instrument. Calibrated ?

Ans.

Karl Fischer reaction is a method for determining the water content in a sample. The instrument used for this reaction is calibrated using standard solutions.

  • Karl Fischer reaction is a chemical reaction that involves the titration of water with iodine.

  • It is commonly used in analytical chemistry to measure the moisture content in various substances.

  • The reaction is based on the principle that iodine reacts with water to form iodide ions.

  • The instrument used for Karl Fischer titr...read more

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Q2. What are main components of HPLC ?

Ans.

The main components of HPLC are the mobile phase, stationary phase, pump, injector, column, detector, and data acquisition system.

  • Mobile phase: The solvent or mixture of solvents that carries the sample through the system.

  • Stationary phase: The solid or liquid phase that retains the analytes based on their interactions.

  • Pump: Responsible for delivering the mobile phase at a constant flow rate.

  • Injector: Introduces the sample into the mobile phase stream.

  • Column: Contains the stat...read more

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Q3. What is chromatography ?

Ans.

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

  • Chromatography involves a stationary phase and a mobile phase.

  • The stationary phase is a solid or liquid material that retains the components of the mixture to be separated.

  • The mobile phase is a liquid or gas that carries the mixture through the stationary phase.

  • Different components of the mixture interact differently with the stationary phase, leading to separ...read more

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Q4. What is nitration reaction ?

Ans.

Nitration reaction is a chemical reaction in which a nitro group (-NO2) is introduced into a molecule.

  • Nitration is a type of electrophilic aromatic substitution reaction.

  • It involves the substitution of a hydrogen atom on an aromatic ring with a nitro group.

  • The reaction is typically carried out using a mixture of nitric acid and sulfuric acid as the nitrating agent.

  • Nitration reactions are commonly used in the synthesis of explosives, dyes, pharmaceuticals, and other organic co...read more

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Q5. What is pH ?

Ans.

pH is a measure of the acidity or alkalinity of a solution.

  • pH stands for 'potential of hydrogen'.

  • It is a logarithmic scale ranging from 0 to 14.

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

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

  • pH is commonly used in various fields such as chemistry, biology, and environmental science.

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Q6. What is normality ?

Ans.

Normality refers to the state of being normal or conforming to a standard or norm.

  • Normality is a concept used in various fields to define what is considered typical or expected.

  • It is often used to describe the behavior, characteristics, or values that are within the range of what is considered normal.

  • Normality can vary depending on the context and can be subjective or objective.

  • In statistics, normality refers to the distribution of data points following a normal distribution ...read more

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