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Ester: Quiz

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Question 1: Protecting a carboxylic acid is useful in peptide synthesis, to prevent self-reactions of the bifunctional ________.
Amino acid synthesisAmino acidMetabolismL-DOPA

Question 2: removal of water by physical means such as distillation as a low-boiling ________ with toluene, in conjunction with a Dean-Stark apparatus.
Spinning coneLiquid-liquid extractionFlocculationAzeotrope

Question 3: Several billion kilograms of polyesters are produced industrially annually, important products being polyethylene terephthalate, acrylate esters, and ________.
Cellulose triacetateCellulose acetateNitrocelluloseAcetic acid

Question 4: ________ is able to reduce esters to two primary alcohols, whereas sodium borohydride does so more slowly.
Lithium hydrideLithium borohydrideLithium aluminium hydrideLithium chloride

Question 5: For example butyl acetate, derived from butanol and ________ would be written CH3CO2C4H9.
Acetic acidOxygenEthanolHydrogen peroxide

Question 6: ________ of alkyl halides with carboxylic acid salts.
SN1 reactionElimination reactionNucleophilic substitutionSN2 reaction

Question 7: Organic carbonates, such as ethylene carbonate are derived from ________ and ethylene glycol.
Carbon dioxideAcetic acidCarbon monoxideCarbonic acid

Question 8: The term ________ is widely used but these compounds are not formally esters because they lack a B=O bond.
Inorganic chemistryBoronic acidClick chemistryOrganic chemistry

Question 9: For example, triphenyl phosphate is the ester derived from phosphoric acid and ________.
ChlorhexidineEthanolHydrogen peroxidePhenol

Question 10: Esters are chemical compounds derived by reacting an oxoacid (one containing an oxo group, X=O) with a hydroxyl compound such as an ________ or phenol.
AlkaneAldehydeAlcoholEthanol







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