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I applied via Referral and was interviewed before Dec 2021. There were 3 interview rounds.
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posted on 13 Jul 2017
I applied via Walk-in and was interviewed before Jan 2022. There were 2 interview rounds.
Preparation of solutions is a crucial task for a QC Chemist.
Determine the required concentration and volume of the solution
Select the appropriate solvent and solute
Weigh the solute accurately and dissolve it in the solvent
Adjust the pH and temperature if necessary
Label the solution with the name, concentration, and date of preparation
Moisture can be calculated by measuring the weight loss of a sample after drying it at a specific temperature.
Weigh the sample before drying
Dry the sample at a specific temperature for a specific time
Weigh the sample again after drying
Calculate the weight loss as a percentage of the original weight
Moisture content = (initial weight - final weight) / initial weight * 100%
Use appropriate equipment and follow standard met
To make 0.1 N NaOH, dissolve 4g of NaOH in 1L of distilled water.
Calculate the molecular weight of NaOH (40g/mol)
Weigh 4g of NaOH and dissolve it in distilled water
Make up the volume to 1L with distilled water
Stir the solution until the NaOH is completely dissolved
Verify the concentration using a standard acid solution
To make standard HCl solution, dilute concentrated HCl with distilled water to the desired concentration.
Calculate the amount of concentrated HCl needed based on the desired concentration and volume of the final solution.
Add the calculated amount of concentrated HCl to a volumetric flask.
Fill the flask with distilled water up to the mark on the neck of the flask.
Mix the solution thoroughly to ensure homogeneity.
Verify ...
Seeking new challenges and growth opportunities in a different work environment.
Looking for a more challenging role that allows me to utilize my skills and knowledge to the fullest
Seeking a change in work environment to gain new experiences and perspectives
Interested in exploring different industries and their applications of chemistry
Desire for professional growth and advancement in my career
Want to work with a team t
I applied via Referral and was interviewed in Jun 2021. There were 3 interview rounds.
I applied via Campus Placement and was interviewed before Jan 2021. There was 1 interview round.
The density of H2SO4 and HNO3 varies depending on the concentration.
The density of H2SO4 and HNO3 can be calculated using the formula: density = mass/volume.
The density of H2SO4 and HNO3 increases with increasing concentration.
The density of H2SO4 and HNO3 at standard conditions (concentration of 1 M) is approximately 1.84 g/mL and 1.41 g/mL, respectively.
pH is a measure of the acidity or alkalinity of a solution. It indicates the concentration of hydrogen ions in the solution.
pH scale ranges from 0 to 14, with 7 being neutral.
A pH value below 7 indicates acidity, with lower values being more acidic.
A pH value above 7 indicates alkalinity, with higher values being more alkaline.
Each unit change in pH represents a tenfold change in acidity or alkalinity.
Examples: Lemon j...
The molecular weight of H2SO4 is 98.09 g/mol.
The molecular weight of H2SO4 can be calculated by adding up the atomic weights of its constituent elements.
H2SO4 consists of 2 hydrogen atoms, 1 sulfur atom, and 4 oxygen atoms.
The atomic weights of hydrogen, sulfur, and oxygen are 1.008 g/mol, 32.06 g/mol, and 16.00 g/mol respectively.
Multiplying the atomic weights by the number of atoms and summing them gives the molecula
Ethanol and methanol are two common types of alcohol. Ethanol has the formula C2H5OH, while methanol has the formula CH3OH.
Ethanol formula: C2H5OH
Methanol formula: CH3OH
Various lab instruments are used in chemistry experiments and analysis.
Spectrophotometer: measures the intensity of light absorbed or emitted by a sample
Centrifuge: separates substances of different densities using centrifugal force
pH meter: measures the acidity or alkalinity of a solution
Bunsen burner: provides a controlled flame for heating substances
Microscope: magnifies and visualizes small samples
Gas chromatograph...
Normality, molality, and molarity are different ways to express the concentration of a solution.
Normality is the concentration of a solution expressed in equivalents per liter.
Molality is the concentration of a solution expressed in moles of solute per kilogram of solvent.
Molarity is the concentration of a solution expressed in moles of solute per liter of solution.
Normality is used in acid-base reactions, while molali...
I applied via Referral and was interviewed in Sep 2021. There was 1 interview round.
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