1. The rate law for a reaction is k[A][B]2
Which
one of the following statements is false?
a. The reaction is first order in A.
b. The reaction is second order in B.
c. The reaction is second order overall.
d. k is the reaction rate constant
2. As the temperature of a reaction is
increased, the rate of the reaction increases because the __________.
a. reactant molecules collide less frequently
b. reactant molecules collide more frequently
and with greater energy per collision
c. activation energy is lowered
d. reactant molecules collide less frequently and
with greater energy per collision
3. The rate of a reaction depends on __________.
a. collision frequency c. collision orientation
b. collision energy d. all of the above
4. Of the following, __________ will lower the
activation energy for a reaction.
a.
increasing the concentrations of reactants
b.
raising the temperature of the reaction
c.
adding a catalyst for the
reaction
d.
removing products as the reaction proceeds
5.
A reaction was found to be zero order in A. Increasing the concentration
of A by a factor of 3 will cause the reaction rate to __________.
a.
remain constant
b.
increase by a factor of 27
c.
increase by a factor of 9
d.
triple
6. The rate law of the overall reaction is k[A][B]0.
Which of the following will not increase the
rate of the reaction?
a. increasing the concentration of reactant A
b. increasing the concentration of reactant B
c. increasing the temperature of the reaction
d. adding a catalyst for the reaction
7. The
minimum amount of energy needed to start a reaction is called the
a.
activation energy.
b.
energy of reaction.
c.
entropy of reaction
d. reaction mechanism
energy
8. When
a lit match is touched to the wick of a candle, the candle begins to burn.
When the match is removed, the candle continues to burn, the
match,
a. behaves as a catalyst
b.
supplies the activation energy
c.
is part of the rate determining step
d. lowers the activation
energy barrier
9. Which step of a reaction is the rate-determining step?
a. the fastest step c. the first step
b. the last step of the reaction mechanism d.
the slowest step
10. Consider
the following mechanism: Step 1: Cl + O3 → ClO + O2
Step 2: O + ClO → Cl + O2
The
reaction intermediate is
a. Cl c. O3
b. O2 d. ClO
11. A
catalyst increases the rate of a reaction by
a. increasing the concentration of reactant(s).
b. decreasing the concentration of the
reactant(s).
c. increasing the activation energy of the
overall reaction.
d.
decreasing the activation energy of the overall reaction.
12. Which of the following would NOT increase the rate of reaction.
a. raising the temperature
b. adding catalyst
c. increasing the concentration of the reactants
d. increasing the volume of the container
13. The rate of a chemical reaction can be expressed in
a. grams per mole.
b. energy consumed per mole.
c. volume of gas per unit time.
d. moles formed per litre of solution
14. Which of the following are necessary for successful collisions to occur?
I. Favourable collision geometry.
II. Sufficient kinetic energy.
III. Large ∆H.
a. I only
b. I and II only
c. II and III only
d. I, II and III
15. Dust particles suspended in the air inside unheated grain elevators can sometimes react explosively
because the dust particles have a
a. high kinetic energy.
b. high activation energy.
c. catalytic effect on the reaction.
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