Question

Which property or properties would be the most useful in characterizing an organic compound that a solid at room temperature. melting point 1L refractive index IL boiling pointIV. color is a solid at room a. b. II and IV f. II and II1 js a lvguid a rooeriy or propertis would be the most usctaul in characteriving an organic compound that I. melting point I. refractive index III. boiling pointIV. color a. b. III and IV c.? f. II and III 4. Which of the following is not a quality of the "perfect" solvent system for a recrystallization? a. it must be inexpensive b. it must not react with the solute c, it must dissolve the solute at cold temperatures and when its warm /d, it must be volatile e. it must dissolve impurities very well or not at all 5. The principal advantage of fractional distillation over simple distillation is... a. fractional can separate azeotropes better due to more theoretical plates b. fractional can be used at higher temperatures due to more theoretical plates c. the glassware is easier to set-up in the fractional distillation d. the glassware is the exact same as the simple distillation including the number of theorctical plates e fractional takes less time to run than the simple distillation. 6. Which one of the following would have the highest retention time (t) when injected onto a polar column? a. pentane b. hexane c. toluene d. cyclohexane

Answer 1

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