AAMC QBANK |ACTUAL QUESTIONS AND VERIFIED
ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
Consider the reaction rate described by the following equation.
Rate = k[A]m[B]n
The overall reaction is said to be second order when:
A.k is constant, m=0, and n=0.
B.k is constant, m=1, and n=1.
C.k is constant, m=2, and n=2.
D.k=2, and m and n are variable
CORRECT ANSWER
B- because the reaction is 2
Question 2
A student plans to add HCl to a solution containing Pb(NO3)2(aq). To determine how much
Pb2+ will precipitate from solution when the HCl is added, the student needs to know
which of the following?
A.Ka for HCl
B.Ka for HNO3
C.Ksp for PbCl2
D.Keq for the reaction Pb2+ + 2 e- Pb
CORRECT ANSWER
C- ksp deals with solubility
1
,Question 3
Which of the following electron configurations of nitrogen is the most stable?
A.
1s22s12p4
B.
1s22s22p3
C.
1s12s22p4
D.
1s22s22p23s1
CORRECT ANSWER
B- nitrogen has 7 electrons and is in ground state
Question 4
When a weak acid (HA) is titrated with sodium hydroxide in the presence of an indicator
(HIn), the pH at which a color change is observed depends on the:
A.
final concentration of HA.
B.
final concentration of HIn.
C.
initial concentration of HA.
D.
pKa of HIn.
CORRECT ANSWER
D- indicator changes color when it reaches its pka
2
,Question 5
Approximately how many moles of Al3+ are reduced when 0.1 faraday of charge passes
through a cell during the production of Al? (Note: Assume there is excess Al3+ available
and that Al3+ is reduced to Al metal only.)
A.
0.033 mol
B.
0.050 mol
C.
0.067 mol
D.
0.10 mol
CORRECT ANSWER
1 faraday = 10^5 Columbs = 1 mole electron
0.1 F x 10^5 Columbs/ 1 F x 1 mole electron/ 10^5 Columbs x 1 mol / 3 mole electron
A = 0.033 mol``
Question 6
The following reaction occurs spontaneously.Cd(s) + 2 H+(aq) → Cd2+(aq) + H2(g) Which of
the following has the highest electron affinity?
A.
Cd(s)
B.
H+(aq)
C.
3
, Cd2+(aq)
D.
H2(g)
CORRECT ANSWER
B- it got reduced
reduced elements have high electron affinity to gain electrons
Question 7
Phosphorus appears directly below nitrogen in the periodic table. The boiling point of
ammonia, NH3, is higher than the boiling point of phosphine, PH3, under standard
conditions. Which of the following statements best explains the difference in the boiling
points of these two compounds?
A.
Ammonia is a weaker base than phosphine.
B.
The N-H bond is weaker than the P-H bond.
C.
High molecular weight compounds generally have lower boiling points.
D.
Ammonia forms stronger intermolecular hydrogen bonds than phosphine.
CORRECT ANSWER
D- hydrogen bond baby
Question 8
A gas that occupies 10 L at 1 atm and 25oC will occupy what volume at 500 atm and 25oC?
A.
4
ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
Consider the reaction rate described by the following equation.
Rate = k[A]m[B]n
The overall reaction is said to be second order when:
A.k is constant, m=0, and n=0.
B.k is constant, m=1, and n=1.
C.k is constant, m=2, and n=2.
D.k=2, and m and n are variable
CORRECT ANSWER
B- because the reaction is 2
Question 2
A student plans to add HCl to a solution containing Pb(NO3)2(aq). To determine how much
Pb2+ will precipitate from solution when the HCl is added, the student needs to know
which of the following?
A.Ka for HCl
B.Ka for HNO3
C.Ksp for PbCl2
D.Keq for the reaction Pb2+ + 2 e- Pb
CORRECT ANSWER
C- ksp deals with solubility
1
,Question 3
Which of the following electron configurations of nitrogen is the most stable?
A.
1s22s12p4
B.
1s22s22p3
C.
1s12s22p4
D.
1s22s22p23s1
CORRECT ANSWER
B- nitrogen has 7 electrons and is in ground state
Question 4
When a weak acid (HA) is titrated with sodium hydroxide in the presence of an indicator
(HIn), the pH at which a color change is observed depends on the:
A.
final concentration of HA.
B.
final concentration of HIn.
C.
initial concentration of HA.
D.
pKa of HIn.
CORRECT ANSWER
D- indicator changes color when it reaches its pka
2
,Question 5
Approximately how many moles of Al3+ are reduced when 0.1 faraday of charge passes
through a cell during the production of Al? (Note: Assume there is excess Al3+ available
and that Al3+ is reduced to Al metal only.)
A.
0.033 mol
B.
0.050 mol
C.
0.067 mol
D.
0.10 mol
CORRECT ANSWER
1 faraday = 10^5 Columbs = 1 mole electron
0.1 F x 10^5 Columbs/ 1 F x 1 mole electron/ 10^5 Columbs x 1 mol / 3 mole electron
A = 0.033 mol``
Question 6
The following reaction occurs spontaneously.Cd(s) + 2 H+(aq) → Cd2+(aq) + H2(g) Which of
the following has the highest electron affinity?
A.
Cd(s)
B.
H+(aq)
C.
3
, Cd2+(aq)
D.
H2(g)
CORRECT ANSWER
B- it got reduced
reduced elements have high electron affinity to gain electrons
Question 7
Phosphorus appears directly below nitrogen in the periodic table. The boiling point of
ammonia, NH3, is higher than the boiling point of phosphine, PH3, under standard
conditions. Which of the following statements best explains the difference in the boiling
points of these two compounds?
A.
Ammonia is a weaker base than phosphine.
B.
The N-H bond is weaker than the P-H bond.
C.
High molecular weight compounds generally have lower boiling points.
D.
Ammonia forms stronger intermolecular hydrogen bonds than phosphine.
CORRECT ANSWER
D- hydrogen bond baby
Question 8
A gas that occupies 10 L at 1 atm and 25oC will occupy what volume at 500 atm and 25oC?
A.
4
