Chapter 8 Test Review
Which of the following compounds is likely to occur as a gas at room temperature?
CH4
Which of the following compounds is likely to have covalent bonds?
CO
Which of the following molecules should exhibit resonance?
O3
How many single bonds are typically formed by the element O?
2
How many single bonds are typically formed by the element N?
3
Which of the following molecules is polar?
H2S
Which of the following has a parent structure that is tetrahedral?
H2S SiCl4 NF3 SO42- all of these
Which image(s) in the figure represents an ionic compound?
I and IV
Which of the molecules in the figure are polar? (Assume that the bonds are all polar.)
I, II, and III
Which of the following substances has both ionic and covalent bonding?
MgCO3
In which of the following bonds does nitrogen have a partial negative charge (δ-)?
N-C
Identify the main-group element X that could form the compound with the following Lewis structure:
O
The formula for aluminum chloride is:
AlCl3
The Lewis symbol for N is:
B
The Lewis symbol for O2- is:
B
Which of the following molecules contains the most polar bonds?
BF3
Which of these molecules or ions has a violation of the octet rule (other than H)?
BH3
Identify the main-group element X that could form the compound with the following Lewis structure:
C
Arrange the following bonds in order of increasing polarity: C-O, C-C, C-N, C-F
C-C < C-N < C-O < C-F
Which of the following contains a double bond?
C2H4
How many single bonds are typically formed by the element C?
4
Draw the Lewis structure for the NO2- ion. What is the total number of electrons shared between nitrogen and the two oxygen atoms?
6
Which of the following compounds is likely to occur as a solid at room temperature?
CaCl2
The formula for calcium sulfide is:
CaS
Which of the following compounds is likely to have a relatively high boiling point?
CoCl3
The Lewis symbol for F is:
D
The Lewis symbol for Ba2+ is:
E
Using periodic trends, arrange the following atoms in order of increasing electronegativity: Cl, Si, Ga, Sr
Sr < Ga < Si < Cl
Which of the following substances has bonding best described as ionic bonding?
TiO2
Which of the following statements regarding VSEPR theory is correct?
VSEPR theory can be used to predict the shape of a molecule.
Identify the class of organic substance for the molecule CH3CH2OH.
alcohol
Identify the class of organic substance for the molecule CH3CH=CH2.
alkene
Which of the following elements is the most electronegative?
oxygen
Predict the molecular shape and give the approximate bond angles in the SO3^2- polyatomic ion.
trigonal pyramidal, 109.5°
Predict the molecular shape and give the approximate bond angles in the PCl3 molecule.
trigonal pyramidal, 109.5º
