TEST BANK FOR ORGANIC CHEMISTRY/graded
A+ (questions and answer) year 2024/2025
A - ANSWER-3H2(g)+N2(g)=2NH3(g) Delta H= -92.2 kJ
At equilibrium, the number of moles of H2(g) are decreased by:
A. decreasing container size
B. adding NH3
C. increasing temperature
D. removing N2
E. adding a catalyst
D - ANSWER-Which factor will affect both the value of the equilibrium constant and the position of
equilibrium for the formation of calcium carbonate?
CaO(s)+CO2(g)=CaCO3(s)+heat
A. increasing the colume of the container
B. adding CO2
C. removing CaO (s)
D. raising the temperature
E. adding a catalyst
E - ANSWER-Consider a reaction 3A(g)+B9s)=2C(g). If 2.o mol A, 3.0 mol B, and 2.0 mol C are present in a
1.0 L flask at equilibrium, what is the value of Kc?
A. 4.0
B. 1.0
C. 2.0
D. 0.25
E. 0.50
C - ANSWER-Consider the following reaction:
,TEST BANK FOR ORGANIC CHEMISTRY/graded
A+ (questions and answer) year 2024/2025
2SO2(g)+O2(g)=2SO3(g) Kp=9.0 at a certain temperature. At the same temperature, what is Kp for SO2
(g) + 1/2O2 (g) = SO3?
A. 9.0
B. 4.5
C. 3.0
D. 18
E. 2.3
B - ANSWER-For the chemical reaction PCl3(g)+Cl2=PCl5(g), delta H rxn=-92.6 kJ. Which conditions favor
maximum conversion of the reactants to product?
A. high pressure and high temperature
B. high pressure and low temperature
C. low pressure and low temperature
D. low pressure and high temperature
E. adding a catalyst
E - ANSWER-Which of the following equilibrium constants indicates that its corresponding reaction goes
nearly to completion?
A. Kc=1.0*10^-2
B. Kc=1.0*10^-8
C. Kc=1.0
D. Kc=1.0*10^2
E. Kc=1.0*10^8
C - ANSWER-In the presence of a catalyst, sulfur dioxide reacts with oxygen to form sulfur trioxide.
2SO2(g)+O2(g)=2SO3(g)
When 2.00 mol of O2 and 2.00 mol of SO2 are placed in a one liter container and allowed to come to
equilibrium at a certain temperature, the mixture is found to contain 1.00 mol of SO3. What is the
amount of O2 at equilibrium?
,TEST BANK FOR ORGANIC CHEMISTRY/graded
A+ (questions and answer) year 2024/2025
A. 0.00 mol
B. 1.00 mol
C. 1.50 mol
D. 0.50 mol
E. 0.75 mol
B - ANSWER-Consider the chemical equilibrium Na2CO3(s)=CO2(g)+Na2O(s) in a closed container at a
certain temperature. The most convenient way to measure the equilibrium constant for the system is to
measure:
A. the temperature of the reaction
B. the pressure of the CO2 gas
C. the molar concentrations of all the reactants
D. the forward and reverse rate constants
E. the mass of the solid present
A - ANSWER-Of the following, all are valid units for a reaction rate except _____.
A. mol/L
B. mol/L-hr
C. g/s
D. mol/hr
E. M/s
C - ANSWER-Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction:
2NO2=2NO+O2
In a particular experiment at 300 degrees C, [NO2] drops from 0.0100 to 0.00650 M in 100 s. The rate of
disappearance of NO2 for this period is ______ M/s.
A. 0.35
B. 1.8*10^-3
C. 3.5*10^-5
, TEST BANK FOR ORGANIC CHEMISTRY/graded
A+ (questions and answer) year 2024/2025
D. 7.0*10^-3
E. 3.5*10^-3
E - ANSWER-Which one of the following is NOT a valid expression for the rate of the reaction below?
4NH3+7O2=4NO2+6H2O
A. 1/6 delta[H2O]/delta t
B. -1/7 delta[O2]/delta t
C. 1/4 delta[NO2]/delta t
D. -1/4 delta[NH3]/delta t
E. All of the above are valid expressions of the reaction rate
B - ANSWER-Of the units below, _____ are appropriate for a first-order reaction rate constant.
A. M-1s-1
B. s-1
C. L mol-1s-1
D. M s-1
E. mol/L
B - ANSWER-GO OVER #5 OF CH 14 and 15 PRACTICE TEST PROBLEMS
D - ANSWER-GO OVER #6 OF CH 14 and 15 PRACTICE TEST PROBLEMS
E - ANSWER-The rate law for a reaction is
rate=k[A][B]^2
Which one of the following statements is FALSE?
A. the reaction is first order in A
B. k is the reaction rate constant
C. if [B] is doubled, the reaction rate will increase by a factor of 4
A+ (questions and answer) year 2024/2025
A - ANSWER-3H2(g)+N2(g)=2NH3(g) Delta H= -92.2 kJ
At equilibrium, the number of moles of H2(g) are decreased by:
A. decreasing container size
B. adding NH3
C. increasing temperature
D. removing N2
E. adding a catalyst
D - ANSWER-Which factor will affect both the value of the equilibrium constant and the position of
equilibrium for the formation of calcium carbonate?
CaO(s)+CO2(g)=CaCO3(s)+heat
A. increasing the colume of the container
B. adding CO2
C. removing CaO (s)
D. raising the temperature
E. adding a catalyst
E - ANSWER-Consider a reaction 3A(g)+B9s)=2C(g). If 2.o mol A, 3.0 mol B, and 2.0 mol C are present in a
1.0 L flask at equilibrium, what is the value of Kc?
A. 4.0
B. 1.0
C. 2.0
D. 0.25
E. 0.50
C - ANSWER-Consider the following reaction:
,TEST BANK FOR ORGANIC CHEMISTRY/graded
A+ (questions and answer) year 2024/2025
2SO2(g)+O2(g)=2SO3(g) Kp=9.0 at a certain temperature. At the same temperature, what is Kp for SO2
(g) + 1/2O2 (g) = SO3?
A. 9.0
B. 4.5
C. 3.0
D. 18
E. 2.3
B - ANSWER-For the chemical reaction PCl3(g)+Cl2=PCl5(g), delta H rxn=-92.6 kJ. Which conditions favor
maximum conversion of the reactants to product?
A. high pressure and high temperature
B. high pressure and low temperature
C. low pressure and low temperature
D. low pressure and high temperature
E. adding a catalyst
E - ANSWER-Which of the following equilibrium constants indicates that its corresponding reaction goes
nearly to completion?
A. Kc=1.0*10^-2
B. Kc=1.0*10^-8
C. Kc=1.0
D. Kc=1.0*10^2
E. Kc=1.0*10^8
C - ANSWER-In the presence of a catalyst, sulfur dioxide reacts with oxygen to form sulfur trioxide.
2SO2(g)+O2(g)=2SO3(g)
When 2.00 mol of O2 and 2.00 mol of SO2 are placed in a one liter container and allowed to come to
equilibrium at a certain temperature, the mixture is found to contain 1.00 mol of SO3. What is the
amount of O2 at equilibrium?
,TEST BANK FOR ORGANIC CHEMISTRY/graded
A+ (questions and answer) year 2024/2025
A. 0.00 mol
B. 1.00 mol
C. 1.50 mol
D. 0.50 mol
E. 0.75 mol
B - ANSWER-Consider the chemical equilibrium Na2CO3(s)=CO2(g)+Na2O(s) in a closed container at a
certain temperature. The most convenient way to measure the equilibrium constant for the system is to
measure:
A. the temperature of the reaction
B. the pressure of the CO2 gas
C. the molar concentrations of all the reactants
D. the forward and reverse rate constants
E. the mass of the solid present
A - ANSWER-Of the following, all are valid units for a reaction rate except _____.
A. mol/L
B. mol/L-hr
C. g/s
D. mol/hr
E. M/s
C - ANSWER-Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction:
2NO2=2NO+O2
In a particular experiment at 300 degrees C, [NO2] drops from 0.0100 to 0.00650 M in 100 s. The rate of
disappearance of NO2 for this period is ______ M/s.
A. 0.35
B. 1.8*10^-3
C. 3.5*10^-5
, TEST BANK FOR ORGANIC CHEMISTRY/graded
A+ (questions and answer) year 2024/2025
D. 7.0*10^-3
E. 3.5*10^-3
E - ANSWER-Which one of the following is NOT a valid expression for the rate of the reaction below?
4NH3+7O2=4NO2+6H2O
A. 1/6 delta[H2O]/delta t
B. -1/7 delta[O2]/delta t
C. 1/4 delta[NO2]/delta t
D. -1/4 delta[NH3]/delta t
E. All of the above are valid expressions of the reaction rate
B - ANSWER-Of the units below, _____ are appropriate for a first-order reaction rate constant.
A. M-1s-1
B. s-1
C. L mol-1s-1
D. M s-1
E. mol/L
B - ANSWER-GO OVER #5 OF CH 14 and 15 PRACTICE TEST PROBLEMS
D - ANSWER-GO OVER #6 OF CH 14 and 15 PRACTICE TEST PROBLEMS
E - ANSWER-The rate law for a reaction is
rate=k[A][B]^2
Which one of the following statements is FALSE?
A. the reaction is first order in A
B. k is the reaction rate constant
C. if [B] is doubled, the reaction rate will increase by a factor of 4
