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WorksheetsC6 Chemical Equilibrium
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Such reactions which continue in both directions are called:
a)
Irreversible reactions
b)
Reversible reactions
c)
Non-reactive reactions
d)
dynamic reactions
2.
This symbol indicates that a reaction is ____________
a)
reversible
b)
irreversible
3.
Changes in pressure will only affect substances that are in the __________ state.
a)
gaseous
b)
liquid
c)
solid
d)
plasma
4.
A complete reaction is in which:
a)
All the reactants convert into products
b)
All the reactants do not convert into products
c)
Half reactants convert into products
d)
only 10% reactants convert into products
5.
What is the equilibrium-constant expression for
CO2(g) + H2(g) ⇌ CO(g) + H2O(l)
a)
Kc= [CO][H2O] / [CO2][H2]
b)
Kc= [CO2][H2] / [CO]
c)
Kc= [CO2][H2] / [CO][H2O]
d)
Kc= [CO] / [CO2][H2]
6.
At elevated temperatures ammonium carbonate, NH2COONH4, is in equilibrium with NH3 and CO2 according to the equation;
NH2COONH4(s) ↔ 2 NH3(g) + CO2(g)
What is the equilibrium expression for this reaction?
a)
K = 2 [NH3][CO2]
[NH2COONH4]
b)
K = [NH3]2[CO2]
[NH2COONH4]
c)
K = 2 [NH3][CO2]
d)
K = [NH3]2[CO2]
7.
2SO2(g)+O2(g)⇌2SO3(g)
Removing O2(g) will
Removing O2(g) will
a)
shift equilibrium right
b)
shift equilibrium left
c)
decrease temperature
d)
have no change
8.
2SO2(g)+O2(g)⇌2SO3(g)
Adding SO2(g) will
Adding SO2(g) will
a)
shift equilibrium right
b)
shift equilibrium left
c)
increase rate of reaction
d)
have no change
9.
2SO2(g)+O2(g)⇌2SO3(g)
Decreasing volume of container will
Decreasing volume of container will
a)
shift equilibrium right
b)
shift equilibrium left
c)
change K
d)
have no change
10.
For the reaction...
heat + N2 + O2 ↔ 2NO
If the heat is added to the chemical system, the equilibrium will shift _______.
heat + N2 + O2 ↔ 2NO
If the heat is added to the chemical system, the equilibrium will shift _______.
a)
left
b)
right
c)
left and right
d)
neither left nor right
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