CHEM 237 - ORGANIC CHEMISTRY LAB FINAL
TAMU EXAM QUESTIONS WITH CORRECT VERIFIED
SOLUTIONS 100% GUARANTEED PASS
Which is NOT a requirement for prep gas chromatography?
a) sample must be volatile
b) sample must be dry
c) sample must be thermally stable
d) sample size must be less than 5 microliters
e) all - ANS ✓d) sample size must be less than 5 microliters
Reaction of naphtholate anion and allyl bromide involved a catalyst (tri-n-
butyl ammonium chloride). The catalyst carries
a) the water soluble naphtholate anion into the organic phase
b) the hydrophobic naphtholate anion into the aqueous phase
c) the water soluble allyl bromide into the organic phase
d) the hydrophobic allyl bromide into the aqueous phase - ANS ✓a) the
water soluble naphtholate anion into the organic phase
In an SN1 solvolysis rxn such as the one in lab
a) the rate of rxn is dependent on rate of addition of NaOH
b) rate constant, k, would 2X if alkyl halide amount was 2X
c) rxn rate accelerated by use of a more polar solvent
d) rate constant would be 0 if rxn mixtures weren't stirred
e) rate constant would be decreased if NaOH wasn't added to neutralize
acid - ANS ✓c) rxn rate accelerated by use of a more polar solvent
CHEM 237
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CHEM
Tertiary alcohols reacting with sodium hypochlorite (NaClO) yield
a) ketones
b) carboxylic acids
c) aldehydes
d) amides
e) none - ANS ✓e) none
Spilled nitric acid/sulfuric acid on you. What do you do? Wash it with
a) water and apply 0.6 M sodium thiosulfate solution
b) water and apply 0.6 M potassium permanganate solution
c) cold water and apply 0.6 M sodium bicarbonate solution
d) 0.6 M sodium hydroxide solution
e) 0.6 M boric acid - ANS ✓c) cold water and apply 0.6 M sodium bicarbonate
solution
Why do you allow a hot recrystallizing solution to cool slowly?
a) quickly forms large crystals, trapping impure solution
b) quickly forms small crystals, adsorbing impurities
c) quickly may induce undesirable reactions
d) quickly causes impurities to oil out, making it impossible to crystallize
e) statement is false, quick cooling is correct - ANS ✓b) quickly forms small
crystals, adsorbing impurities
Butyl Butyrate, an ester, differs from p-dioxane, an ether, by showing
strong infrared absorbance at
a) 3500 1/cm
b) 2950 1/cm
c) 2250 1/cm
d) 1745 1/cm
CHEM 237
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