Chemical Bonding Worksheet With Answer Key
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11ch9 and 10 practice test
1.
Which of the following covalent bonds is the most polar (highest percent ionic character)?
•
•
•
•
•
A. Al
I
B. Si
I
C. Al
Cl
D. Si
Cl
E. Si
P
2.
What is the hybridization of the central atom in ClO
?
3 –
A. sp
2
3
3
3
2
B. sp
C. sp
D. sp
d
E. sp
d
3.
Which of the following solids would have the lowest melting point?
A. KI
B. KBr
C. KCl
D. KF
Estimate the enthalpy change, ΔH, for the reaction 2CO + O
→ 2CO
4.
given the
2
2
following bond energies.
BE(C≡O) = 1074 kJ/mol
BE(O=O) = 499 kJ/mol
BE(C=O) = 802 kJ/mol
A. +2380 kJ
B. +744 kJ
C. +1949 kJ
D. -561 kJ
E. -744 kJ
5.
Which one of the following molecules has an atom with an expanded octet?
A. HCl
B. AsCl
C. ICl
D. NCl
E. Cl
5
3
2
6.
How many covalent bonds will a nitrogen atom usually form?
A. 1
B. 2
C. 3
D. 5
E. 8
7.
Which of the elements listed below has the greatest electronegativity?
A. Mg
B. Ga
C. Si
D. Ba
E. Pb
8.
Which of the atoms listed below is the most electronegative?
A. Li
B. Cs
C. P
D. As
E. Ge
9.
Which one of the following molecules is nonpolar?
A. NH
B. OF
C. CH
Cl
D. H
O
E. BeCl
3
2
3
2
2
10. The geometry of the ClF
molecule is best described as:
3
A. distorted tetrahedron
B. trigonal planar
C. tetrahedral
D. T-shaped
E. trigonal pyramidal
3 2
11. According to the VSEPR, theory the geometry of the atoms in the carbonate ion, CO
–
is
A. square planar.
B. tetrahedral.
C. pyramidal.
D. trigonal planar.
E. octahedral.
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