Chapter 9 Review Test
10. When a hydrogen atom is part of a molecular structure, it is always a ________ atom. a. terminal b. central c. ionic d. 1-
a
A binary compound is a ___________. a. compound made of two types of atoms b. compound made of one type of atom c. compound made of three types of atoms d. compound made of polyatomic ions
a
Side—on overlaps of atomic orbitals are also referred to as ___________. a. pi bonds b. sigma bonds c. delta bonds d. hydrogen bonds
a
To determine the number of bonding electron pairs, you must divide the number of electrons available for bonding by _______. a. 2 b. 3 c. 1 d. 4
a
What hybridization is present in an octahedral molecular geometry? a. sp3d2 b. sp2 c. sp3 d. sp3d
a
What is the charge on the simple monatomic ion that sulfur forms? a. 2- b. 1- c. 1+ d. 2+
a
What is the name of the aqueous solution of H2SO4? a. sulfuric acid b. sulfurous acid c. hydrogen persulfide d. hydrogen persulfate
a
Which of the following is the formula for nitric acid? a. HNO3 b. HN c. HNO2 d. HNO
a
How many lone pairs of electrons are present in a molecule of water? a. 3 b. 2 c. 1 d. 4
b
How many sigma and how many pi bonds are present in the ethene molecule (C2H4)? a. 5 sigma and 2 pi b. 5 sigma and 1 pi c. 4 sigma and 1 pi d. 4 sigma and 2 pi
b
Large differences in electronegativity result in __________ bonding between atoms. a. no b. ionic c. polar d. covalent
b
What is the correct name for H2SO3 in an aqueous solution? a. sulfuric acid b. sulfurous acid c. hydrosulfic acid d. hydrosulfuric acid
b
Which compound consists of nonpolar molecules? a. H2S b. SiH4 c. AsH3 d. PH3
b
13. Many simple molecules contain two lone pairs around the central atom. Which type of electron—to—electron repulsions are smallest in these molecules? a. lone pair to lone pair b. bonding pair to lone pair c. bonding pair to bonding pair d. All repulsions are equal.
c
14. Which element has the highest electronegativity? a. Ne b. N c. F d. O
c
In forming a molecular structure, each atom should have ________ electrons around it unless there is some specific reason why this cannot be achieved. a. 4 b. 6 c. 8 d. 2
c
Which element can share only one pair of electrons? a. O b. C c. H d. N
c
12. When two or more atoms join together by sharing their outermost electrons, ________. a. a mixture is formed b. an ionic compound is formed c. a solution is formed d. a molecular compound is formed
d
Single covalent bonds are also referred to as ___________. a. delta bonds b. pi bonds c. hydrogen bonds d. sigma bonds
d
The phosphorus pentachloride molecule is nonpolar and contains no unshared electron pairs on the phosphorus atom. What are all the possible bond angles in this molecule? a. 120° b. 180° c. 90° and 180° d. 90°, 120°, and 180°
d
What is the formula for the binary compound of potassium and chlorine? a. K2ClO3 b. KHCl c. KCl2 d. KCl
d
