AAMC Test 3 Questions with Verified Solutions
For a thermodynamic mixture of isomeric #5. What is the total amount of charge and
products - -the relative mole ratio of energy, respectively, that the capacitor will store
products is directly related to the relative stability if it is connected to the battery on the railcar? -
of these products -1.20C and 7.20J
C=Q/V
#2. What can be inferred from the results of Energy stored by a capacitor = Ue = (1//2)CV^2 =
scheme A about the relative thermodynamic (1/2)QV = (1/2)Q^2V
stabilities of Compounds 4a and 4b
Given
A. Compound 4a is less stable than Compound V= 12V
4b. C = 100 x 10^-3 F
B. They are equally stable.
C. Nothing can be inferred about relative Q = VC = (12)(100 x 10^-3) = 1.20 C
thermodynamic stabilities.
D. Compound 4a is more stable than Compound Ue = (1/2)QV = (1/2)(1.20)(12) = 7.20J
4b. - -Compound 4a is more stable than 4b
The image shows that 4a is produced 60% and #6. Suppose that the railcar passes by a horn
4b 40%. that is emitting a sound with a frequency f. Which
--So 4a will be more stable among the two of the following describes f' that the person on the
thermodynamic products railcar hears? - -f' > f before passing the
horn, f' < f after passing it
#3. Which of the following compounds is most Due to doppler effect, the frequency that the
likely to be a major product in step 2 if the aldol person on the railcar hears before passing the
condensation is NOT followed by a dehydration horn is larger than the actual frequency of the
reaction? - -Ans in image sound emitted, while the person hears a
frequency lower than the actual frequency after
--coz if there is no dehydration, then the OH passing the horn
would be present instead of the double bond
--Before passing the horn, the object(rail car) is
coming closer to the source (horn) so f'>f
#4. Compound X is shown below.(image) --After passing the horn, the object(railcar) is
moving away from the source (horn) so f<f'
If compound 2 is replaced with compound X,
what will be the structure of the final product in
steps 1 and 2? (Note: assume that the yields of Doppler effect - -The apparent frequency
steps 1 and 2 are not affected by substitution) - (f') of the source is increased as the source
-Ans in image approaches the observer, and is decreased as
the sources leaves the observer
--coz this is the product of Michael addition
followed by intramolecular aldol condensation f' = ((V+_ Vo)/(V-+Vs))f
(Robinson annulation)
#7. A railcar has a decelerating force of 1000 N. if
, AAMC Test 3 Questions with Verified Solutions
no braking occurs, a total of how much power speed, according to the passage. Because the
would be required to keep the railcar moving at decelerating force is directly proportional to the
40 m/s? deceleration acceleration, it follows that the
decelerating acceleration itself declines linearly
A. 16 kW with speed. Finally, because the decelerating
B. 40 kW acceleration is the rate of change of velocity, or
C. 600 kW the slope of the velocity vs. time graph, then the
D. 800 kW - -Power = work done/ time slope of the graph must decrease in time
Work done = Fd
v= d/t --> d =vt
#9. The relative thermodynamic stability of
W= Fd --> Fvt isomeric organic compounds can be inferred from
P = Fv = (1000N)(40) = 40000 W = 40 kW which of the following types of experimental
data?
There are lot of force values given in the
passage but we use 1000N coz the power A. Boiling points
required must match the work done by the B. UV-visible absorption spectra
friction force that tends to slow down the railcar C. Mass spectroscopic fragmentation patterns
D. Heats of combustion - -D. Heats of
combustion
#10. Raadioactive tritium (3H) labeleed guanine
has been used to measure the rate of The relative thermodynamic stability of isomers
biochemical processes that involve its building or can be determined based on the amount of heat
incorporation produced when the compounds are combusted;
less heat, greater stability
Given that water is the solvent for this type of
experiment, what is the best site for tritum
labeling? - -I #14. The energy of activation for the reaction
described in the passage is given by the energy
Because the best site for tritium labeling would of: - -The activated complex minus the
not exchange the tritium ions for protons in energy of the reactants
water. All of the N-H sites (II-IV) would readily
exchange tritium protons due to their lone pair- The activation energy for the reaction presents
facilitating protonation and subsequent tritium the minimum energy barrier necessary to be
exchange with water, but the C-H site (I), lacking overcome by the reactants on the path to
a lone pair, would retain its tritium label products
#8. If a generator-brake system alone were #16. What type of reaction is occurring between
engaged when the railcar was moving, which of I2 and Zn? - -Oxidation-reduction
the following graphs would most accurately
represent the subsequent speed of the railcar? - because both Zn and I2 change oxidation states
-Ans Image--> during the reaction
Coz the speed of the car decreases in time such
that the decelerating force declines linearly with #18. What is the period of the voltage source that
, AAMC Test 3 Questions with Verified Solutions
operates the plasma pencil? - -1000ns of glucose is 180 g/mol or 180 ug/umol
Because the period of a time-varying signal is the a) 20 ug
shortest repitition time. According to fig 2, each b) 60 ug
pulse is on for 500ns, then off for 500ns. Thus c) 90 ug
the time between consecutive pulse is 500ns + d) 270 ug - -B
500ns = 1000ns
the device measured 0.67 or 2/3 of the electrons.
which means that 1/3 of the electrons were
#19. What is the maximum energy of the UV consumed. thus, that means that 1/3 of 180.
photons generated by this plasma pencil? (Note: which is 60 ug
speed of light is c = 3.0 x 10^8 m/s; Planck's
constant is h = 6.63 x 10^-34 J.s)
lamda = 200-300n - -E=hf = hc/lamda #24. What additional substance is necessary for
reaction 2 to take place?
given: A. FAD
B. NADH
lamda = 200-300nm C. H2O
the question is asking for MAXIMUM energy, so D. Acetyl-CoA - -FAD
you would want to minimize the denominator, so
use 200nm for lamda --Because among the choices listed, only FAD is
a cofactor oxidant
E = (6.63 x 10^-34 J.s)( 3.0 x 10^8 m/s)/ (200 x
10^-9 m) = 1 x 10^-18
What is one characteristic of steroid - -
FOUR FUSED RINGS
#20. That the electric field is uniform between the
electrodes means that the electric field lines:
#26. The pH of a 1L phosphate buffer solution
a) are more closely spaced to the positive was measured as 7.6, but the experimental
electrode than at the negative one procedure calls for a pH 7.2 buffer. Which
b)intersect halfway between the electrodes method will adjust the solution to the proper pH?
c) are more closely spaced at the negative (Note: pKa values for phosphoric acid are 2.2,
electrode than at the positive one 7.2, and 12.3.)
d) are equally spaced at both electrodes
between them - -are equally spaced at A, Add enough 1M Na2HPO3 to increase the
both electrodes and between them phosphate anion concentration ten-fold
B. Add 1M NaOH to neutralize a portion of the
--By definition, electric field lines are spaced in a hydronium ions found in the solution
uniform field C. Alter the ratio of the monosodium/disodium
phosphate added to favor the monosodium
species
#23. the glucose meter measures the current D. All 100mL distilled, deionized water to dilute
produced during reaction 3. If 0.67 umol of the basicity of the buffer - -Alter the ratio of
electrons were measured, what mass of glucose monosodium/disodium phosphate added to favor
was present in the sample. Note the molar mass the monosodium species
For a thermodynamic mixture of isomeric #5. What is the total amount of charge and
products - -the relative mole ratio of energy, respectively, that the capacitor will store
products is directly related to the relative stability if it is connected to the battery on the railcar? -
of these products -1.20C and 7.20J
C=Q/V
#2. What can be inferred from the results of Energy stored by a capacitor = Ue = (1//2)CV^2 =
scheme A about the relative thermodynamic (1/2)QV = (1/2)Q^2V
stabilities of Compounds 4a and 4b
Given
A. Compound 4a is less stable than Compound V= 12V
4b. C = 100 x 10^-3 F
B. They are equally stable.
C. Nothing can be inferred about relative Q = VC = (12)(100 x 10^-3) = 1.20 C
thermodynamic stabilities.
D. Compound 4a is more stable than Compound Ue = (1/2)QV = (1/2)(1.20)(12) = 7.20J
4b. - -Compound 4a is more stable than 4b
The image shows that 4a is produced 60% and #6. Suppose that the railcar passes by a horn
4b 40%. that is emitting a sound with a frequency f. Which
--So 4a will be more stable among the two of the following describes f' that the person on the
thermodynamic products railcar hears? - -f' > f before passing the
horn, f' < f after passing it
#3. Which of the following compounds is most Due to doppler effect, the frequency that the
likely to be a major product in step 2 if the aldol person on the railcar hears before passing the
condensation is NOT followed by a dehydration horn is larger than the actual frequency of the
reaction? - -Ans in image sound emitted, while the person hears a
frequency lower than the actual frequency after
--coz if there is no dehydration, then the OH passing the horn
would be present instead of the double bond
--Before passing the horn, the object(rail car) is
coming closer to the source (horn) so f'>f
#4. Compound X is shown below.(image) --After passing the horn, the object(railcar) is
moving away from the source (horn) so f<f'
If compound 2 is replaced with compound X,
what will be the structure of the final product in
steps 1 and 2? (Note: assume that the yields of Doppler effect - -The apparent frequency
steps 1 and 2 are not affected by substitution) - (f') of the source is increased as the source
-Ans in image approaches the observer, and is decreased as
the sources leaves the observer
--coz this is the product of Michael addition
followed by intramolecular aldol condensation f' = ((V+_ Vo)/(V-+Vs))f
(Robinson annulation)
#7. A railcar has a decelerating force of 1000 N. if
, AAMC Test 3 Questions with Verified Solutions
no braking occurs, a total of how much power speed, according to the passage. Because the
would be required to keep the railcar moving at decelerating force is directly proportional to the
40 m/s? deceleration acceleration, it follows that the
decelerating acceleration itself declines linearly
A. 16 kW with speed. Finally, because the decelerating
B. 40 kW acceleration is the rate of change of velocity, or
C. 600 kW the slope of the velocity vs. time graph, then the
D. 800 kW - -Power = work done/ time slope of the graph must decrease in time
Work done = Fd
v= d/t --> d =vt
#9. The relative thermodynamic stability of
W= Fd --> Fvt isomeric organic compounds can be inferred from
P = Fv = (1000N)(40) = 40000 W = 40 kW which of the following types of experimental
data?
There are lot of force values given in the
passage but we use 1000N coz the power A. Boiling points
required must match the work done by the B. UV-visible absorption spectra
friction force that tends to slow down the railcar C. Mass spectroscopic fragmentation patterns
D. Heats of combustion - -D. Heats of
combustion
#10. Raadioactive tritium (3H) labeleed guanine
has been used to measure the rate of The relative thermodynamic stability of isomers
biochemical processes that involve its building or can be determined based on the amount of heat
incorporation produced when the compounds are combusted;
less heat, greater stability
Given that water is the solvent for this type of
experiment, what is the best site for tritum
labeling? - -I #14. The energy of activation for the reaction
described in the passage is given by the energy
Because the best site for tritium labeling would of: - -The activated complex minus the
not exchange the tritium ions for protons in energy of the reactants
water. All of the N-H sites (II-IV) would readily
exchange tritium protons due to their lone pair- The activation energy for the reaction presents
facilitating protonation and subsequent tritium the minimum energy barrier necessary to be
exchange with water, but the C-H site (I), lacking overcome by the reactants on the path to
a lone pair, would retain its tritium label products
#8. If a generator-brake system alone were #16. What type of reaction is occurring between
engaged when the railcar was moving, which of I2 and Zn? - -Oxidation-reduction
the following graphs would most accurately
represent the subsequent speed of the railcar? - because both Zn and I2 change oxidation states
-Ans Image--> during the reaction
Coz the speed of the car decreases in time such
that the decelerating force declines linearly with #18. What is the period of the voltage source that
, AAMC Test 3 Questions with Verified Solutions
operates the plasma pencil? - -1000ns of glucose is 180 g/mol or 180 ug/umol
Because the period of a time-varying signal is the a) 20 ug
shortest repitition time. According to fig 2, each b) 60 ug
pulse is on for 500ns, then off for 500ns. Thus c) 90 ug
the time between consecutive pulse is 500ns + d) 270 ug - -B
500ns = 1000ns
the device measured 0.67 or 2/3 of the electrons.
which means that 1/3 of the electrons were
#19. What is the maximum energy of the UV consumed. thus, that means that 1/3 of 180.
photons generated by this plasma pencil? (Note: which is 60 ug
speed of light is c = 3.0 x 10^8 m/s; Planck's
constant is h = 6.63 x 10^-34 J.s)
lamda = 200-300n - -E=hf = hc/lamda #24. What additional substance is necessary for
reaction 2 to take place?
given: A. FAD
B. NADH
lamda = 200-300nm C. H2O
the question is asking for MAXIMUM energy, so D. Acetyl-CoA - -FAD
you would want to minimize the denominator, so
use 200nm for lamda --Because among the choices listed, only FAD is
a cofactor oxidant
E = (6.63 x 10^-34 J.s)( 3.0 x 10^8 m/s)/ (200 x
10^-9 m) = 1 x 10^-18
What is one characteristic of steroid - -
FOUR FUSED RINGS
#20. That the electric field is uniform between the
electrodes means that the electric field lines:
#26. The pH of a 1L phosphate buffer solution
a) are more closely spaced to the positive was measured as 7.6, but the experimental
electrode than at the negative one procedure calls for a pH 7.2 buffer. Which
b)intersect halfway between the electrodes method will adjust the solution to the proper pH?
c) are more closely spaced at the negative (Note: pKa values for phosphoric acid are 2.2,
electrode than at the positive one 7.2, and 12.3.)
d) are equally spaced at both electrodes
between them - -are equally spaced at A, Add enough 1M Na2HPO3 to increase the
both electrodes and between them phosphate anion concentration ten-fold
B. Add 1M NaOH to neutralize a portion of the
--By definition, electric field lines are spaced in a hydronium ions found in the solution
uniform field C. Alter the ratio of the monosodium/disodium
phosphate added to favor the monosodium
species
#23. the glucose meter measures the current D. All 100mL distilled, deionized water to dilute
produced during reaction 3. If 0.67 umol of the basicity of the buffer - -Alter the ratio of
electrons were measured, what mass of glucose monosodium/disodium phosphate added to favor
was present in the sample. Note the molar mass the monosodium species
