Chemical Kinetics Worksheet With Answers By Prof. Abdullah M. Asiri - 2009 Page 18
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33August 16, 2009
[PROBLEM SET FROM R. CHANG TEST
BANK]
62. According to the collision theory, all collisions do not lead to reaction. Which choice gives both reasons
why not all collisions between reactant molecules lead to reaction?
1. The total energy of two colliding molecules is less than some minimum amount of energy.
2. Molecules cannot react with each other unless a catalyst is present.
3. Molecules that are improperly oriented during collision will not react.
4. Solids cannot react with gases.
A.
1 and 2
B.
1 and 3
C.
1 and 4
D.
2 and 3
E.
3 and 4
63. When the concentrations of reactant molecules are increased, the rate of reaction increases. The best
explanation for this phenomenon is that as the reactant concentration increases,
A.
the average kinetic energy of molecules increases.
B.
the frequency of molecular collisions increases.
C.
the rate constant increases.
D.
the activation energy increases.
E.
the order of reaction increases.
64. A reaction mechanism usually is
A.
the same as the balanced chemical equation.
B.
restricted to only one possible explanation.
C.
obvious if the reaction order is known.
D.
difficult, if not impossible, to prove.
E.
obvious if the activation energy is known.
→ I
+
-
-
65. The rate law for the reaction H
O
+ 2H
+ 2I
+ 2H
O is rate = k[H
O
][I
]. The following
2
2
2
2
2
2
mechanism has been suggested.
Identify all intermediates included in this mechanism.
+
-
A.
H
and I
+
B.
H
and HOI
-
C.
HOI and OH
+
D.
H
only
-
E.
H
O and OH
2
18
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education