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Review 1.B.2
Test Description: Equilibrium and Le Chatelier's principle
Instructions: Answer all questions to get your test result.
1) For the reaction... SO2 + O2 − SO3 If the concentration of SO2 is increased, the equilibrium of the reaction will shift ___________.
A
right
B
left
C
neither left nor right
D
left and right
2) For the reaction... SO2 + O2 − SO3 If the equilibrium shifts to the right, the concentration of O2 will ___________.
A
stay the same
B
double
C
decrease
D
increase
3) For the reaction... SO2 + O2 − SO3 If the concentration of O2 is decreased, the equilibrium of the reaction will shift ___________.
A
left and right
B
right
C
neither left nor right
D
left
4) For the reaction... heat + N2 + O2 − 2NO If the heat is added to the chemical system, the equilibrium will shift _______.
A
right
B
left and right
C
left
D
neither left nor right
5) In exothermic reactions heat is a
A
product
B
reactant
C
catalyst
D
light
6) In an endothermic reaction heat is a
A
light
B
reactant
C
catalyst
D
product
7) Increasing temperature of exothermic reactions will cause them to
A
stay the same
B
shift left
C
shift right
D
melt
8) Which of the following does not effect equilibrium?
A
pressure
B
time
C
temperature
D
concentration
9) For the reaction... H2 (g) + Cl2 (g) − 2HCl (g) + heat If the temperature is cooled, the _________ reaction will be favored.
A
forward
B
forward and reverse
C
reverse
10) For the reaction... H2 (g) + Cl2 (g) − 2HCl (g) + heat If the pressure in the system is increased, the equilibrium will _______.
A
not shift
B
shift right
C
shift left
11) For the reaction... N2 (g) + 3 H2 (g) − 2 NH3 (g) If the pressure in the system is increased, _______ reaction will be favored.
A
neither
B
reverse
C
forward
12) Which of the following is NOT true at equilibrium?
A
The concentration of the reactants is equal to the concentration of the products.
B
The forward and reverse reactions continue to occur.
C
The concentrations of reactants and products do not change.
D
The forward and reverse reactions proceed at the same rate.
*select an answer for all questions
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