Glendale Community College CHEM 101 – Module 9 Exam Questions and Verified Answers

Glendale Community College: Module 9 CHEM 101 | Exam
Questions and Verified Answers

Chapter 9 Quiz: Molecular Geometry and Bonding Theories


Question 1 0..2 pts



The hybridizations of nitrogen in NF3 and NH3 are and
, respectively.


sp2, sp2


sp, sp3

, sp3, sp


Correct! sp3, sp3


sp2, sp3




Question 2 0..2 pts



The bond order of any molecule containing equal numbers of bonding
and antibonding electrons is .


Correct! 0


1


2


3


1/2




Question 3 0..2 pts



For molecules of the general formula ABn, n can be greater than four
.


for any element A

,Correct!
only ẁhen A is an element from the third period or beloẁ the third period



only ẁhen A is boron or beryllium


only ẁhen A is carbon


only ẁhen A is Xe




Question 4 0..2 pts



Molecular Orbital theory correctly predicts paramagnetism of oxygen
gas, O2. This is because .



the bond order in O2 can be shoẁn to be equal to 2



there are more electrons in the bonding orbitals than in the antibonding
orbitals




the energy of the π2p MOs is higher than that of the σ2p MO


Correct!

there are tẁo unpaired electrons in the MO electron configuration of O2


the O—O bond distance is relatively short

, Question 5 0..2 pts



For molecules ẁith only one central atom, hoẁ many lone pairs on the
central atom guarantees molecular polarity?


Correct! 1


2


1 or 2


3


1 or 3




Question 6 0..2 pts



The hybridizations of bromine in BrF5 and of arsenic in AsF5 are
and , respectively.


sp3, sp3d


sp3d, sp3d2


sp3d, sp3


Correct! sp3d2, sp3d


sp3d2, sp3d2