Amul India Molecular Biologist Interview Questions and Answers

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 ...read more