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6. The correct answer is (B).
Aluminum trihydride has three equivalent bonds distributed–– equally in space.
7. The correct answer is (C). Carbon dioxide has two equal C = O bonds; this molecule is linear.
8. The correct answer is (E). Hydrogen selenide is a bent molecule with a structure similar to that of
H
2
O because it has two pairs of nonbonding electrons.
9. The correct answer is (C). C
10
H
8
is naphthalene, and it is found in mothballs giving them their char
acteristic smell.
10. The correct answer is (A). Acetic acid is the major acid component of vinegar.
11. The correct answer is (E). Carbonic acid decomposes into CO
2
+ H
2
O to produce bubbles.
12. The correct answer is (B). Hydrogen sulfide is produced when eggs rot, and it is responsible for the
“rotten egg” smell.
13. The correct answer is (E). This is a double-displacement reaction: two compounds react to form
two different compounds.
ANSWER KEY
1.
B
2.
E
3.
A
4.
D
5.
D
6.
B
7.
C
8.
E
9.
C
10.
A
11.
E
12.
B
13.
E
14.
C
15.
A
16. D
17. E
18. C
19. A
20. E
21. D
22. C
23. D
24. A
25. C
101. T F
102. T T CE
103. F T
104. F T
105. F F
106. F T
107. T F
108. F T
109. T F
110. T T CE
111. F T
112. F T
113. T T