Bonding
1. Which one of the following is most likely to be an ionic compound?
a.
HNF
2
b.
H
2
CO
c.
N
2
H
4
d.
CaCl
2
e.
CH
3
Cl
2. In which of the following processes does the enthalpy change (
Δ
H
) directly represent
the magnitude of the lattice energy of KCl(
s
)?
a.
Cl
2
(
g
) + 2K(
s
)
→
2KCl(
s
)
b.
KCl(
s
)
→
K
+
(
aq
) + Cl
-
(
aq
)
c.
KCl(
s
)
→
K
+
(
g
) + Cl
-
(
g
)
d.
KCl(
s
)
→
K(
s
) + Cl
-
(
g
)
e.
KCl(
s
)
→
K(
s
) + Cl(
g
)
3. Order the following by increasing bond strength: N
≡
N, N=N, N-N
a.
N
≡
N, N=N, N-N
b.
N
≡
N, N-N, N=N
c.
N-N, N=N, N
≡
N
d.
N=N, N-N, N
≡
N
e.
N=N, N
≡
N, N-N
4. Which of the following compounds has the greatest bond polarity?
a.
PH
3
b.
NH
3
c.
HF
d.
H
2
S
e.
CH
4
5. Which of the following is not planar?
a.
BCl
3
b.
ClF
3
c.
PCl
3
d.
XeF
4
e.
C
2
H
4