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Addverb Technologies Interview Questions and Answers
Q1. What is karl fisher reaction and how instrument. Calibrated ?
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
Q2. What are main components of HPLC ?
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
Q3. What is chromatography ?
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
Q4. What is nitration reaction ?
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
Q5. What is pH ?
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.
Q6. What is normality ?
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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