WorksheetsChemical Equilibrium 1
Total questions: 10
Worksheet time: 9mins
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.
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
3.
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]
4.
Changes in pressure will only affect substances that are in the __________ state.
a)
gaseous
b)
liquid
c)
solid
d)
plasma
5.
What is the equilibrium-constant expression for
CO2(g) + H2(g) ↔ CO(g) + H2O(l)
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.
This symbol indicates that a reaction is ____________
a)
reversible
b)
irreversible
7.
2A + 3B <----> 2AB
The forward reaction forms the substance __________.
The forward reaction forms the substance __________.
a)
A
b)
B
c)
AB
d)
A + B
8.
For the reaction...
SO2 + O2 <−> SO3
If the concentration of SO2 is increased, the equilibrium of the reaction will shift ___________.
SO2 + O2 <−> SO3
If the concentration of SO2 is increased, the equilibrium of the reaction will shift ___________.
a)
left
b)
right
c)
left and right
d)
neither left nor right
9.
At what time the reaction reached equilibrium?
a)
t1
b)
t2
c)
t3
d)
t4
10.
Which of the two graphs reaches equilibrium?
a)
The left one.
b)
The right one.
c)
Both of them.
d)
Neither.
100 %
