AAMC FL 1 FULL REVIEW- Chem/Phys
(Latest Update 2024)
In the chromatography of the reaction mixture, water
absorbed on cellulose functioned as the stationary phase.
What was the principal factor determining the migration
of individual components in the sample?
A.Hydrogen bonding
B.Solute concentration
C.Stationary phase concentration
D.Thickness of paper - Correct Answer ✅B and D are
dumb options. Knock them out.
hydrogen bonding to the stationary phase will determine
the relative rate of migration of the various components
in the sample.
When thinking migration, think bonding. If it bonds super
well, it isn't going to move very far.
,AAMC FL 1 FULL REVIEW- Chem/Phys
(Latest Update 2024)
What assumption is being made if scientists conclude
that aspartic acid was formed by the prebiological
synthesis in the passage?
A.Aspartic acid is unstable at temperatures below 150°C.
B.All of the malic acid underwent the dehydration
reaction to form fumaric/maleic acid.
C.Compound A and cyanide were available on primitive
Earth.
D.The reaction between ammonia and fumaric acid was
catalyzed by the presence of water. - Correct Answer
✅POE:
D- is wrong. water is not a catalyst
,AAMC FL 1 FULL REVIEW- Chem/Phys
(Latest Update 2024)
B- some of the magic acid was turned to aspartic acid in
the next equation. WRONG.
A- the 150 degrees comes into play when the scientists
are doing the actual experiment, NOT the synthesis.
C- passage has right before the figure of the reaction:
"scientists have studied the production of amino acids
under conditions that simulate those of primitive Earth."
^^^^this indicates that C is the right answer.
According to the developed chromatography plate shown
below, what is the approximate Rf value of aspartic acid?
- Correct Answer ✅Rf: distance travelled by
analyze/distance traveled by solvent.
2/10---> 0.2
, AAMC FL 1 FULL REVIEW- Chem/Phys
(Latest Update 2024)
Which of the following statements does NOT correctly
describe the dehydration of malic acid to fumaric acid
and maleic acid?
A.The reaction occurs most readily with tertiary alcohols.
B.The reaction involves the loss of a water molecule.
C.The reaction has a carbocation intermediate.
D.The reaction is stereospecific. - Correct Answer
✅NOT is the key word.
DEHYDRATION involves:
-loss of a water molecule (cross b out)
-it does have a carbocation (sn1)
-and does like tert substitutions (snl)
(Latest Update 2024)
In the chromatography of the reaction mixture, water
absorbed on cellulose functioned as the stationary phase.
What was the principal factor determining the migration
of individual components in the sample?
A.Hydrogen bonding
B.Solute concentration
C.Stationary phase concentration
D.Thickness of paper - Correct Answer ✅B and D are
dumb options. Knock them out.
hydrogen bonding to the stationary phase will determine
the relative rate of migration of the various components
in the sample.
When thinking migration, think bonding. If it bonds super
well, it isn't going to move very far.
,AAMC FL 1 FULL REVIEW- Chem/Phys
(Latest Update 2024)
What assumption is being made if scientists conclude
that aspartic acid was formed by the prebiological
synthesis in the passage?
A.Aspartic acid is unstable at temperatures below 150°C.
B.All of the malic acid underwent the dehydration
reaction to form fumaric/maleic acid.
C.Compound A and cyanide were available on primitive
Earth.
D.The reaction between ammonia and fumaric acid was
catalyzed by the presence of water. - Correct Answer
✅POE:
D- is wrong. water is not a catalyst
,AAMC FL 1 FULL REVIEW- Chem/Phys
(Latest Update 2024)
B- some of the magic acid was turned to aspartic acid in
the next equation. WRONG.
A- the 150 degrees comes into play when the scientists
are doing the actual experiment, NOT the synthesis.
C- passage has right before the figure of the reaction:
"scientists have studied the production of amino acids
under conditions that simulate those of primitive Earth."
^^^^this indicates that C is the right answer.
According to the developed chromatography plate shown
below, what is the approximate Rf value of aspartic acid?
- Correct Answer ✅Rf: distance travelled by
analyze/distance traveled by solvent.
2/10---> 0.2
, AAMC FL 1 FULL REVIEW- Chem/Phys
(Latest Update 2024)
Which of the following statements does NOT correctly
describe the dehydration of malic acid to fumaric acid
and maleic acid?
A.The reaction occurs most readily with tertiary alcohols.
B.The reaction involves the loss of a water molecule.
C.The reaction has a carbocation intermediate.
D.The reaction is stereospecific. - Correct Answer
✅NOT is the key word.
DEHYDRATION involves:
-loss of a water molecule (cross b out)
-it does have a carbocation (sn1)
-and does like tert substitutions (snl)
