ACS Gen Chem 2 Exam Study
Guide – Practice Questions
with Verified Answers. GRADED
A+. Latest 2026/2027 Update
C - Answer✔✔-Where is the hydrophilic (attracted to water) region of the
molecule?
(A) Region 1
(B) Region 2
(C) Region 3
(D) The three regions are equally hydrophilic
C - Answer✔✔-Which molecule is most soluble in water?
D - Answer✔✔-A solution of NaCl in water has a concentration of 20.5% by
mass. What is the molal concentration of the solution?
Molar Mass NaCl = 58.44 g/mol
(A) 0.205 m
,(B) 0.258 m
(C) 3.51 m
(D) 4.41 m
B - Answer✔✔-What is the mole fraction of water in 200 g of 89% (by mass)
ethanol, C2H5OH?
Molar Mass C2H3OH = 46 g/mol
(A) 0.11
(B) 0.24
(C) 0.32
(D) 0.76
D - Answer✔✔-A mixture of 100 g of K2Cr2O7 and 200 g of water is stirred at
60 degrees C until no more of the salt dissolves. The resulting solution is
poured off into a separate beaker, leaving the undissolved solid behind. The
solution is now colled to 20 degrees C. What mass of K2Cr2O7 crystallizes from
the solution during the cooling?
(A) 9 g
(B) 18 g
(C) 31 g
(D) 62 g
A - Answer✔✔-Carbonated beverages have a fizz because of gas dissolved in
the solution. What increases the concentration of gas in a solution?
, (A) cooling the solution
(B) heating the solution
(C) increasing the volume of solution
(D) decreasing the volume of solution
D - Answer✔✔-When 100 g of an unknown compound was dissolved in 1.00 kg
of water, the freezing point was lowered by 6.36 degrees C. What is the identity
of this unknown compound?
Kf for water = 1.86 degrees C/m
(A) CsCl
(B) KCl
(C) LiF
(D) NaCl
A - Answer✔✔-Which 0.1 molal aqueous solution will have the lowest freezing
point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl
B - Answer✔✔-What is the rate law of this reaction?
2H2 (g) + 2NO (g) --> N2 (g) + 2H2O (g)
Guide – Practice Questions
with Verified Answers. GRADED
A+. Latest 2026/2027 Update
C - Answer✔✔-Where is the hydrophilic (attracted to water) region of the
molecule?
(A) Region 1
(B) Region 2
(C) Region 3
(D) The three regions are equally hydrophilic
C - Answer✔✔-Which molecule is most soluble in water?
D - Answer✔✔-A solution of NaCl in water has a concentration of 20.5% by
mass. What is the molal concentration of the solution?
Molar Mass NaCl = 58.44 g/mol
(A) 0.205 m
,(B) 0.258 m
(C) 3.51 m
(D) 4.41 m
B - Answer✔✔-What is the mole fraction of water in 200 g of 89% (by mass)
ethanol, C2H5OH?
Molar Mass C2H3OH = 46 g/mol
(A) 0.11
(B) 0.24
(C) 0.32
(D) 0.76
D - Answer✔✔-A mixture of 100 g of K2Cr2O7 and 200 g of water is stirred at
60 degrees C until no more of the salt dissolves. The resulting solution is
poured off into a separate beaker, leaving the undissolved solid behind. The
solution is now colled to 20 degrees C. What mass of K2Cr2O7 crystallizes from
the solution during the cooling?
(A) 9 g
(B) 18 g
(C) 31 g
(D) 62 g
A - Answer✔✔-Carbonated beverages have a fizz because of gas dissolved in
the solution. What increases the concentration of gas in a solution?
, (A) cooling the solution
(B) heating the solution
(C) increasing the volume of solution
(D) decreasing the volume of solution
D - Answer✔✔-When 100 g of an unknown compound was dissolved in 1.00 kg
of water, the freezing point was lowered by 6.36 degrees C. What is the identity
of this unknown compound?
Kf for water = 1.86 degrees C/m
(A) CsCl
(B) KCl
(C) LiF
(D) NaCl
A - Answer✔✔-Which 0.1 molal aqueous solution will have the lowest freezing
point?
(A) Al(NO3)3
(B) CaCl2
(C) C2H5OH
(D) NaCl
B - Answer✔✔-What is the rate law of this reaction?
2H2 (g) + 2NO (g) --> N2 (g) + 2H2O (g)
