AAMC Practice Test 3 - C/P Review 2024/2025 with 100% correct answers
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AAMC Practice T3 - C/P R
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AAMC Practice T3 - C/P R
What can be inferred from the results of Scheme A about the relative thermodynamic stabilities of Compounds 4a and 4b?
A. They are equally stable.
B. Compound 4a is less stable than Compound 4b.
C. Compound 4a is more stable than Compound 4b.
D. Nothing can be inferred about relative thermodyna...
What can be inferred from the results of Scheme A about the relative thermodynamic stabilities of
Compounds 4a and 4b?
A. They are equally stable.
B. Compound 4a is less stable than Compound 4b.
C. Compound 4a is more stable than Compound 4b.
D. Nothing can be inferred about relative thermodynamic stabilities. correct answersThe answer is C -
Compound 4a is more stable than Compound 4b. This is because there is a higher percentage of
compound 4a than compound 4b at equilibrium (60% vs. 40%). For a thermodynamic mixture the
relative mole ratio of products is directly related to the relative stability of these products. Thus, 4a is
more stable than 4b.
Which of the following compounds is most likely to be a major product in Step 2 if the aldol
condensation is NOT followed by a dehydration reaction? correct answersThe answer to this is A.
because an aldol addition occurs if there is no dehydration in an aldol condensation.
What is the total amount of charge and energy, respectively, that the capacitor will store if it is
connected to the battery on the railcar?
A. 0.12 C and 14.4 J
B. 1.20 C and 7.20 J
C. 1.44 C and 0.12 J
D. 7.20 C and 1.20 J correct answersThe answer to this question is B. 1.20 C and 7.20 J. This is because
the charge is given by the formula q = CV and the relation 100mF x 12 V = 1.2 C and the energy is equal
to 0.5 x 100mF x (12 V)2 = 7.2 J.
Suppose that the railcar passes by a horn that is emitting a sound with frequency f. Which of the
following describes the frequency f that the person on the railcar hears?
A. f > f before passing the horn, f < f after passing it
B. f < f before passing the horn, f > f after passing it
C. f = f before passing the horn, f = f after passing it
, D. f > f before passing the horn, f > f after passing it correct answersThe correct answer is A. This is
because of the Doppler effect - the frequency that the person on the railcar hears before passing the
horn is larger than the actual frequency of the sound emitted, while the person hears a frequency lower
than the actual frequency after passing the horn.
If no braking occurs, a total of how much power would be required to keep the railcar moving at 40 m/s?
A. 16 kW
B. 40 kW
C. 600 kW
D. 800 kW correct answersThe correct answer is B. 40 kW. This is because of the formula P = Fv. So, P =
1000 N * 40 m/s so 40,000 W. In other words, 40 kW.
If the generator-brake system alone were engaged when the railcar was moving, which of the following
graphs would most accurately represent the subsequent speed of the railcar? correct answersThe
correct answer is D. This is because the speed of the car decreases in time such that the decelerating
force declines linearly with speed, according to the passage. Because the decelerating force is directly
proportional to the deceleration acceleration, it follows that the decelerating acceleration itself declines
linearly with speed. Finally, because the decelerating acceleration is rate of change of velocity, or the
slope of the velocity vs. time graph, then the slope of the graph must decrease in time. This is only
option with a continuously decreasing slope (A. is a constant slope value).
Given that water is the solvent for this type of experiment, what is the best site for tritium labeling?
A. I
B. II
C. III
D. IV correct answersThe answer to this question is A. I. This is because the best site for tritium labeling
would not exchange the tritium (3H) ions for protons in water. all of the N-H sites (II-IV) would readily
exchange tritium protons due to their lone pair but the C-H site (I) lacking a lone pair would retain its
tritium label.
Based on these data, HCO3- is best categorized as:
A. a base since Ka > Kb for this ion.
B. a base since Kb > Ka for this ion.
C. an acid since Ka > Kb for this ion.
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