2003
(A) CO2
(B) H2O
(C) CH4
(D) C2H4
(E) PH3
3. The molecule with only one double bond.
4. The molecule with the largest dipole
moment
5. The molecule that has trigonal pyramidal
geometry
• 3)D
• 4)B
• 5)E
•
In which of the following groups are the
three species isoelectronic?
a)
b)
c)
d)
e)
S2-, K+, Ca2+
Sc, Ti, V2+
O2-, S2-, ClMg2+, Ca2+, Sr2+
Cs, Ba2+, La3+
• A
Of the following compounds, which is the
most ionic?
(a) SiCl4
(b) BrCl
(c) PCl3
(d) Cl2O
(e) CaCl2
• E
•
Which of the following oxides is gas at 25
degrees C?
(a) Rb2O
(b) N2O
(c) Na2O2
(d) SiO2
(e) La2O3
• B
A pure, white crystalline solid dissolves in water to
yield a basic solution that liberates a gas when
excess acid is added to it. On the basis of this
information, the solid could be
(a) KNO3
(b) K2CO3
(c) KOH
(d) KHSO4
(e) KCL
• B
Types of Hybridization exhibited by the C atoms in
propene, CH3CHCH2 include which of the
following?
I.
sp
II. sp2
III. Sp3
(a)
(b)
(c)
(d)
(e)
I only
III only
I and II only
II and III only
I, II, and III
• D
•
Of the following molecules, which has
the largest dipole moment?
(a) CO
(b) CO2
(c) O2
(d) HF
(e) F2
• D
The electron-dot structure (Lewis Structure)
for which of the following molecules
would have two unshared pairs of
electrons on the central atom?
(A) H2S
(B) NH3
(C) CH4
(D) HCN
(E) CO2
• A
I2(g) + 3Cl2(g)  2ICl3(g)
According to the data in the table below, what is the value of DHo for the
reaction represented above?
Bond Average Bond Energy kJ/mole
I–I
149
Cl – Cl
239
I – Cl
208
(a)
(b)
(c)
(d)
(e)
-860 kJ
-382 kJ
+180 kJ
+450 kJ
+1258 kJ
• B
Which of the following molecules has a
dipole moment of zero?
(a) C6H6
(b) NO
(c) SO2
(d) NH3
(e) H2S
• A
Molecules that have planar configuration
include which of the following?
I.
BCl3 II. CHCl3
(a)
(b)
(c)
(d)
(e)
I only
III only
I and II only
II and III only
I, II and III only
III. NCl3
• A
The SbCl5 molecule has a trigonal bipyramidal
structure. Therefore the hybridization of Sb
orbitals should be.
a.
b.
c.
d.
e.
sp2
sp3
dsp2
dsp3
d2sp3
• D
CCl4, CO2, PCl5, PCl3, SF6
•
Which of the following does not describe
any of the molecules above?
(a) Linear
(b) Octahedral
(c) Square planar
(d) Tetrahedral
(e) Trigonal pyramidal
• C