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Orgo 1 Lab Final
USF
| Question | Answer |
|---|---|
| The water inlet of the condenser in a distillation technique is | closer to the receiver |
| The water outlet of the condenser in a distillation technique is | closer to the distillation head |
| Which of the following is true about the position of a fractionating column in a distillation setup? | It is placed between the distilling vial and the distilling head |
| The boiling point of a liquid A is 75C and that of liquid B is 85C. Which technique of distillation gives you the best separation of the two liquids? | Fractional distillation |
| Which physical property would be affected most by changes in the atmospheric pressure? | Boiling point |
| In experiment 1, you will distill a binary mixture containing: | equal amounts of cyclohexane and toluene |
| The compound that shows reactivity towards HCl solution is | 4-Chloroaniline |
| An organic layer made of the ether solvent containing an organic compound is found: | on top of the aqueous layer in a separatory funnel |
| When HCl was added to an organic layer containing an amine, benzoic acid and naphthalene, what happens? | 4-Chlorobenzenaminium chloride is formed |
| The solution which is required to generate benzoic acid from sodium benzoate is | Acidic |
| One of the followings is not true about a solvent used for extraction | Solvent should have a high stability for the organic compounds |
| The mobile phase in TLC is | liquid |
| Which is not important in determining Rf? | Time taken by the solvent to reach the solvent front |
| The stationary phase in column chromatography is | solid |
| In this experiment, B-carotene will be isolated using which of the following technique? | Column Chromatography (CC) |
| When you isolate B-Carotene, the mobile phase is: | Petroleum ether |
| Which sterochemistry does the chiral carbon of the natural product limonene have? | R |
| The natural product limonene in this experiment will be isolated by a technique known as | steam distillation |
| The magnitude of the value of optical rotation does NOT depend on: | Number of carbon atoms in the chiral compound |
| Enantiomeric excess (ee) is commonly known as | optical purity |
| Refractive index of a liquid is measured by an instrument known as | refractometer |
| When trimyristin is treated with NaOH/C2H5OH, the products formed are: | Sodium myristate and glycerol |
| How do you isolate trimyristin in this experiment? | Extraction followed by column chromatography |
| Myristic acid belongs to which class of organic compounds? | Fatty acids |
| In the mixed melting point concept of this experiment, a wide melting point comparable with the literature value confirms that: | Trimyristin has been hydrolyzed to myristic acid |
| Why id the mixed melting point concept important and relevant for this experiment? | Because the melting point of trimyristin is similar to that of myristic acid |
| Which is not true of today's experiment? | tert-butyl chloride is synthesized via Sn2 mechanism |
| Which salt can be used to neutralize the organic solution? | NaHCO3 |
| The fact that an alkyl halide reacts fast with NaI solution indicates that the alkyl halide is most probably | a primary |
| Which can be a side product in today's experiment? | Isobutylene |
| Which alkyl halide readily reacts with AgNO3? | 2-chloro-2-methylpropane |
| Which on the following is an electrophile? | I)methyl iodide; III) trimethyliodomethane; 2-iodopropane; VI) diisopropylmethyliodomethane |
| Which one of the following is the strongest nucleophile? | (CH3CH2)3N |
| Which substrate gives the fastest Sn2 reaction when it reacts with triethylamine? | CH3CH2I |
| In experiment 8, reactions of iodomethane with the different amines reveal that rates of Sn2 reactions depend on: | the nature of the nucleophile |
| Which of the following describes the reaction in experiment 9? | dehyrdration of alcohols |
| In experiment 9, the major product of the reaction is | 2-methyl-2-butene |
| The stationary phase in a GC experiment is usually: | a non-volatile liquid |
| Which of the following affects a GC experiment? | injector temperature, oven temperature, rate of gas flow |
| Distillation can be used to remove: | a volatile solvent from a nonvolatile product, to separate a volatile product from a nonvolatile impurities, or to separate two or more volatile products that have sufficiently different boiling points |
| The liquid with a higher vapor pressure is higher in concentration and would be collected | first |
| Use fractional distillation when | the boiling point difference of the components is small |
| Define distillation | the process in which a liquid is heated to boiling and condensing the vapors above the boiling liquid |
| If the solute is completely soluble in the organic solvent and completely insoluble in water, then K will have a value of | infinity (Never actually attained) |
| Any value of K other than 1.0 indicates what? | That the solute is more soluble in one of the two solvents |
| The more dense liquid will be on | the bottom |
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