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CHEM 237 - Organic Chemistry Lab Final Exam TAMU 100%
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CHEM 237 - Organic Chemistry Lab Final Exam TAMU 100%
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CHEM 237 - Organic Chemistry Lab Final ExamTAMU 100% Solved
Which of the following alcohols undergoes dehydration reaction (E1) most rapidly?
a) 2-methyl-2-butanol
b) 2-pentanol
c) 3-pentanol
d) 1-pentanol
e) none, all of these have formula C5H12O and undergo dehydration at the same rate - ✔✔a) 2-
methyl-2-butanol
You are given a DCM solution with compounds A, B, and C. First extract with 3N NaOH, only a salt of A
is in the aqueous layer. Re-extract organic layer with 3N HCl, only C in organic layer. Compound A is
probably
a) hexane
b) benzoic acid
c) naphthalene
d) sodium sulfate
e) benzocaine - ✔✔b) benzoic acid
Which is true of molecular mechanics?
a) employs ab initio methods to calculate strain energies
b) treats chemical bonds as mechanical springs
c) doesn't follow Hooke's Law
d) requires cray super computers to do simple calculations
e) all - ✔✔b) treats chemical bonds as mechanical springs
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 - ✔✔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 - ✔✔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 - ✔✔c) rxn
rate accelerated by use of a more polar solvent
Tertiary alcohols reacting with sodium hypochlorite (NaClO) yield
a) ketones
b) carboxylic acids
c) aldehydes
d) amides
e) none - ✔✔e) none
Spilled nitric acid/sulfuric acid on you. What do you do? Wash it with
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