Chapter 5
1. In a double bond _______ electrons are shared between two atoms. a. 2 b. 3 c. 4 d. 6
2. Which molecule has a triple bond? a. H2 b. F2 c. Cl2 d. N2
3. Which central atom has eight electrons around it when it forms the covalent compounds? a. AlCl3 b. phosphorus pentachloride c. sulfur hexafluoride d. methane
4. what is the molecular geometry for PCl3. a. trigonal planar b. tetrahedral c. linear d. pyramidal
5. Which is the shortest bond? a. N–N b. N=N c. N≡N d. All three bond lengths should be about the same
6. Based on the indicated electronegativities, arrange the following in order of increasing ionic character: CsBr, LaBr3, PBr3, MgBr2.

a. CsBr, LaBr3, MgBr2, PBr3 b. CsBr, MgBr2, PBr3, LaBr3 c. PBr3, LaBr3, MgBr2, CsBr d. PBr3, MgBr2, LaBr3, CsBr
7. The oxygen-oxygen bond in O2 has a bond order of a. 3 b. 1 c. 2 d. 6
8. Which of the following contains an atom that does not obey the octet rule? a. KBr b. CO2 c. ClF3 d. ICl
9. How many lone pairs of electrons are on the Xe atom in XeF6? a. 0 b. 1 c. 2 d. 3
10. What is the molecular geometry of IF5?
a. octahedral
b. seesaw
c. square pyramidal
d. trigonal bipyramidal
11. A single sp3 hybrid orbital has
a. one lobe.
b. two lobes of equal size.
c. two lobes of unequal size.
d. four lobes of equal size.
12. A double bond is generally composed of
a. three π bonds.
b. one π bond and one σ bond.
c. one π bond and two σ bonds.
d. three σ bonds.
13. What orbital hybridization is expected for the central atom in a molecule with a trigonal planar geometry?
a. sp
b. sp2
c. sp3
d. None of the above
14. What is the angle between adjacent sp3 hybrid orbitals?
a. 90°
b. 109.5°
c. 120°
d. 180°
15. What is the hybridization on the N atom in NO2- and in NO3-?
a. sp2 for NO2- and sp3 for NO3-
b. sp3 for NO2- and sp2 for NO3-
c. sp for NO2- and sp2 for NO3-
d. sp2 for both

1. In a double bond _______ electrons are shared between two atoms. a. 2 b. 3 c. 4 d. 6
2. Which molecule has a triple bond? a. H2 b. F2 c. Cl2 d. N2
3. Which central atom has eight electrons around it when it forms the covalent compounds? a. AlCl3 b. phosphorus pentachloride c. sulfur hexafluoride d. methane
4. what is the molecular geometry for PCl3. a. trigonal planar b. tetrahedral c. linear d. pyramidal
5. Which is the shortest bond? a. N–N b. N=N c. N≡N d. All three bond lengths should be about the same
6. Based on the indicated electronegativities, arrange the following in order of increasing ionic character: CsBr, LaBr3, PBr3, MgBr2.

a. CsBr, LaBr3, MgBr2, PBr3 b. CsBr, MgBr2, PBr3, LaBr3 c. PBr3, LaBr3, MgBr2, CsBr d. PBr3, MgBr2, LaBr3, CsBr
7. The oxygen-oxygen bond in O2 has a bond order of a. 3 b. 1 c. 2 d. 6
8. Which of the following contains an atom that does not obey the octet rule? a. KBr b. CO2 c. ClF3 d. ICl
9. How many lone pairs of electrons are on the Xe atom in XeF6? a. 0 b. 1 c. 2 d. 3
10. What is the molecular geometry of IF5?
a. octahedral
b. seesaw
c. square pyramidal
d. trigonal bipyramidal

11. A single sp3 hybrid orbital has
a. one lobe.
b. two lobes of equal size.
c. two lobes of unequal size.
d. four lobes of equal size.
12. A double bond is generally composed of
a. three π bonds.
b. one π bond and one σ bond.
c. one π bond and two σ bonds.
d. three σ bonds.
13. What orbital hybridization is expected for the central atom in a molecule with a trigonal planar geometry?
a. sp
b. sp2
c. sp3
d. None of the above
14. What is the angle between adjacent sp3 hybrid orbitals?
a. 90°
b. 109.5°
c. 120°
d. 180°
15. What is the hybridization on the N atom in NO2- and in NO3-?
a. sp2 for NO2- and sp3 for NO3-
b. sp3 for NO2- and sp2 for NO3-
c. sp for NO2- and sp2 for NO3-
d. sp2 for both