- In the equilibrium CO(g)+H2O(g)⇌CO2(g)+H2(g)CO(g) + H_2O(g) \rightleftharpoons CO_2(g) + H_2(g)CO(g)+H2O(g)⇌CO2(g)+H2(g), adding more CO2CO_2CO2 will:
a) Shift the equilibrium to the right
b) Shift the equilibrium to the left
c) Increase the value of KcK_cKc
d) Decrease the concentration of H2H_2H2
Answer: b - For the reaction 2SO2(g)+O2(g)⇌2SO3(g)2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g)2SO2(g)+O2(g)⇌2SO3(g), if the temperature is decreased, the equilibrium constant KcK_cKc:
a) Increases
b) Decreases
c) Remains unchanged
d) Reaches zero
Answer: a - For the reaction 2NO(g)+Cl2(g)⇌2NOCl(g)2NO(g) + Cl_2(g) \rightleftharpoons 2NOCl(g)2NO(g)+Cl2(g)⇌2NOCl(g), increasing the pressure will:
a) Shift the equilibrium to the right
b) Shift the equilibrium to the left
c) Have no effect on equilibrium
d) Decrease the concentration of NOClNOClNOCl
Answer: a - In the reaction PCl5(g)⇌PCl3(g)+Cl2(g)PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g)PCl5(g)⇌PCl3(g)+Cl2(g), decreasing the pressure will:
a) Shift the equilibrium to the right
b) Shift the equilibrium to the left
c) Increase the concentration of Cl2Cl_2Cl2
d) Decrease the concentration of PCl3PCl_3PCl3
Answer: b - The equilibrium constant KcK_cKc for the reaction 2NO(g)⇌N2(g)+O2(g)2NO(g) \rightleftharpoons N_2(g) + O_2(g)2NO(g)⇌N2(g)+O2(g) decreases if:
a) The concentration of NO is increased
b) The temperature is increased
c) The pressure is increased
d) The volume is decreased
Answer: b - For the reaction H2(g)+I2(g)⇌2HI(g)H_2(g) + I_2(g) \rightleftharpoons 2HI(g)H2(g)+I2(g)⇌2HI(g), the value of KcK_cKc will:
a) Increase with increasing temperature
b) Decrease with increasing temperature
c) Remain unchanged with temperature
d) Increase with pressure
Answer: b - In the equilibrium N2(g)+3H2(g)⇌2NH3(g)N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)N2(g)+3H2(g)⇌2NH3(g), decreasing the temperature will:
a) Shift the equilibrium to the right
b) Shift the equilibrium to the left
c) Increase the equilibrium constant
d) Decrease the reaction rate
Answer: a - For the reaction 2SO2(g)+O2(g)⇌2SO3(g)2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g)2SO2(g)+O2(g)⇌2SO3(g), increasing the concentration of SO2SO_2SO2 will:
a) Shift the equilibrium to the right
b) Shift the equilibrium to the left
c) Increase the value of KcK_cKc
d) Decrease the concentration of SO3SO_3SO3
Answer: a - The value of KcK_cKc for an endothermic reaction will:
a) Increase with increasing temperature
b) Decrease with increasing temperature
c) Remain unchanged with temperature
d) Increase with pressure
Answer: a - In the reaction 2NO2(g)⇌N2O4(g)2NO_2(g) \rightleftharpoons N_2O_4(g)2NO2(g)⇌N2O4(g), decreasing the temperature will:
a) Shift the equilibrium to the right
b) Shift the equilibrium to the left
c) Increase the value of KcK_cKc
d) Decrease the concentration of N2O4N_2O_4N2O4
Answer: a
