Siyaram Silk Mills Senior Executive QA Interview Questions and Answers

GC and HPLC are both analytical techniques used to separate and analyze mixtures of compounds.

• GC separates compounds based on their volatility and boiling points, while HPLC separates compounds based on their polarity and size.

• GC uses a gas as the mobile phase and a solid or liquid stationary phase, while HPLC uses a liquid as the mobile phase and a solid stationary phase.

• GC is typically used for volatile and semi-vola...read more

Raw materials used in polyester include petroleum, coal, air, and water.

• Polyester is made from a chemical reaction between an acid and an alcohol.

• The acid used is typically terephthalic acid or dimethyl terephthalate.

• The alcohol used is typically ethylene glycol.

• Other raw materials used in the production of polyester include catalysts and stabilizers.

• Polyester production is heavily reliant on petroleum and coal as sour