Multiple
Choice
Identify the letter of the choice that best completes the statement or answers the
question.
|
|
|
1.
|
Which of the following
compounds is expected to have the strongest ionic bonds? a. | RbF | b. | NaF | c. | NaI | d. | CsBr | e. | CsI | | |
|
|
|
2.
|
Which of the following is a
correct Lewis structure for ozone, O3?
|
|
|
3.
|
How many resonance structures
can be drawn for the thiocyanate ion, SCN-? The carbon atom is in the center of this
ion.
|
|
|
4.
|
Which of the following species
will have a Lewis structure most like that of SF4? a. | XeF4 | b. | SO42- | c. | ICl4+ | d. | PF4+ | e. | IO4- | | |
|
|
|
5.
|
What are the bond angles in
ClO4-? a. | 90° | b. | 109.5° | c. | 120° | d. | 180° | e. | 90° and
180° | | |
|
|
|
6.
|
What is the formal charge on
each atom in a hypobromite ion, OBr-? a. | O = -2, Br = -1 | b. | O = -2, Br = +1 | c. | O = -1, Br = +1 | d. | O = -1, Br = 0 | e. | O = 0, Br = -1 | | |
|
|
|
7.
|
Predict which of the following
compounds will have the most polar covalent bond(s). a. | HF | b. | CBr4 | c. | H2S | d. | NCl3 | e. | HI | | |
|
|
|
8.
|
Which one of the following
molecules has a dipole moment? a. | CI4 | b. | PF5 | c. | NCl3 | d. | SO3 | e. | O2 | | |
|
|
|
9.
|
Which one of the following
molecules or ions has a dipole moment? a. | IO4- | b. | ICl2- | c. | SF4 | d. | XeF4 | e. | CO2 | | |
|
|
|
10.
|
When bonding electrons are
unequally shared, we say that the bond is polar. Linus Pauling noticed that the energy of a polar
bond is often greater than expected. He attributed the greater bond energy to a. | a coulombic attraction between atoms with partially positive and negative
charges. | b. | the greater bond lengths of the heteronuclear
bonds. | c. | one of the many unexplainable phenomena that scientists
encounter. | d. | the ability of heteronuclear species to form double and triple
bonds. | e. | the higher number of valence electrons found in heteronuclear
molecules. | | |
|