Section 6.3
Nature of Reactions
Practice Test
1.
Reactions that can occur in either direction are said to be ____________.
a.
backward
b.
forward
c.
limited
d.
reversible
Hint
2.
A system is said to be in ___________ when no net change in the amounts of reactants and products occurs.
a.
dislacement
b.
equilibrium
c.
reverse
d.
state
Hint
3.
________________ indicate a state of equilibrium in a chemical equation.
a.
Double reaction arrows
b.
A plus sign
c.
An equal sign
d.
A minus sign
Hint
4.
Changes in an equilibrium system can be described according to _____________ principle.
a.
Boyle's
b.
Dalton's
c.
Le Chatelier's
d.
Rutherford's
Hint
5.
Adding reactants causes an equilbrium to ______________.
a.
shift to the right
b.
remain unchanged
c.
shift to the left
d.
shift in both directions simultaneously
Hint
6.
Activation energy is the energy required to _________________.
a.
initiate a reaction
b.
stop a reaction
c.
speed up a reaction
d.
slow down a reaction
Hint
7.
A substance that increases the rate of a chemical reaction without being permanently changed or consumed is called ______________.
a.
a catalyst
b.
a product
c.
a reactant
d.
an equilibrate
Hint
8.
Adding energy to an equilibrium system that is exothermic to the right causes the system to ______________.
a.
shift to the left
b.
shift to the right
c.
remain unchanged
d.
slow down
Hint
