CHEM 1211: Fall Term 2004
Practice Final
Module Four B

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Module Four

Module 4 Test Masters:

Mary Alcott (maliceall@juno.com)

Juliana C. Allebach (Ruuufie@aol.com)

John Taylor (jtaylor@hccfl.edu) [Consultant]

Multiple Choice [One Answer Only]

Question 1

Which one of the following is a correct Lewis electron-dot formula for SO₃?

a)
b)
c)
d)

Question 2

Which one of the following is a correct Lewis electron-dot formula for CO₃^-2?

a)
b)
c)
d)

Question 3

What is the shape of the CS₂ molecule?

a) linear
b) bent
c) tetrahedral
d) trigonal planar

Question 4

What is the approximate O-S-O bond angle in SO₂?

a) 90^o
b) 109^o
c) 120^o
d) 180^o

Question 5

Which one of the following sets of molecules would have bond angles of 105^o,107^o,and 109.5^o respectively?

a) CH₄,H₂O, NH₃
b) H₂O, NH₃,CH₄
c) NH₃, H₂O, CH₄
d) H₂O, CH₄,NH₃
e) none of the above

Question 6

What is the approximate O-C-O bond angle in CO₃^-2

a) 90^o
b) 109^o
c) 120^o
d) 180^o
e) none of the above

Question 7

The bond angles a,b & c in the molecule shown below would respectively be:

a) 109.5^o,109.5^o,109.5^o
b) 120^o,109.5^o,120^o
c) 107^o,109.5^o,120^o
d) 90^o,180^o,90^o

Question 8

Determine the shape and polarity of the BeCl₂ molecule.

a) linear, nonpolar
b) linear, polar
c) bent, nonpolar
d) bent, polar

Question 9

Which of the following molecules is polar?

a) BeCl₂
b) BF₃
c) CBr₄
d) SiH₂Cl₂

Question 10

What is the hybridization of the carbon atom in carbon dioxide?

a) sp
b) sp²
c) sp³
d) sp³d
e) sp³d²

Question 11

The sp² hybrid orbital set contains how many orbitals?

a) 2
b) 3
c) 4
d) 5
e) 6

Question 12

The respective hybridizations of nitrogen in NF₃ and NH₃ are

a) sp² and sp²
b) sp and sp³
c) sp3 and sp
d) sp³ and sp³
e) sp² and sp³

Question 13

What is the hybirdization and H-O-C bond angle for the oxygen atom labled y?

a) sp, 180^o
b) sp², 109^o
c) sp³, 109^o
d) sp³d², 90^o
e) none of the above

Question 14

Sideways overlap of two p-orbitals resulting in two regions of electron density in common to the two nuclei are known as

a) a pi bond
b) a sigma bond
c) a delta bond
d) a double bond

Question 15

A typical triple bond consists of

a) three sigma bonds
b) three pi bonds
c) one sigma and two pi bonds
d) two sigma and one pi bond
e) none of the above

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CHEM 1211: Fall Term 2004 Practice Final Module Four B