Metropolitan Eximchem Trainee Research Associate Interview Questions and Answers

A name reaction is a chemical reaction named after its discoverer or developer. Solve it with given reactant.

• Grignard reaction: RMgX + H2O -> R-OH + Mg(OH)X

• Friedel-Crafts reaction: R-X + AlCl3 -> R-C6H5

• Buchwald-Hartwig reaction: Ar-NH2 + R-X -> Ar-R + NH3 + X

• Suzuki-Miyaura reaction: Ar-B(OH)2 + R-X -> Ar-R + B(OH)3 + X

• Heck reaction: Ar-X + R-CH=CH2 -> Ar-R + HX

• Diels-Alder reaction: C6H10 + C6H6 -> C12H12

• Wittig reaction...read more

TLC stands for Thin Layer Chromatography. Polar solvents like methanol, ethanol, and water are used as mobile phase for non-polar stationary phase. Non-polar solvents like hexane, toluene, and chloroform are used as mobile phase for polar stationary phase.

• TLC is a chromatography technique used to separate and identify compounds in a mixture.

• It involves a stationary phase (usually a thin layer of silica gel or alumina) ...read more

Performed experiments on synthesis of aspirin and extraction of caffeine from tea leaves.

• Synthesized aspirin by reacting salicylic acid with acetic anhydride in the presence of sulfuric acid catalyst.

• Extracted caffeine from tea leaves using solvent extraction method with dichloromethane as solvent.

• Performed thin layer chromatography to confirm the purity of synthesized aspirin and extracted caffeine.

• Conducted acid-base...read more