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Online Study Guide - Covalent


Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
A chemical bond that occurs when atoms share electrons is a(n) ____ bond.
a.
covalent
c.
magnetic
b.
ionic
d.
polyatomic
 

 2. 
A compound that is made up only of carbon and hydrogen is called a(n) ____.
a.
alcohol
c.
carbohydrate
b.
amino acid
d.
hydrocarbon
 

 3. 
A hydrocarbon that has at least one double or triple bond is ____.
a.
aromatic
c.
substituted
b.
saturated
d.
unsaturated
 

 4. 
A hydrocarbon containing only single-bonded carbon atoms is called a(n) ____ hydrocarbon.
a.
aromatic
c.
saturated
b.
substituted
d.
unsaturated
 

 5. 
How many electrons does a carbon atom have in its outer energy level?
a.
2
c.
6
b.
4
d.
8
 

 6. 
The electrons involved in the formation of a chemical bond are called
a.
dipoles.
c.
Lewis electrons.
b.
s electrons.
d.
valence electrons.
 

 7. 
What are shared in a covalent bond?
a.
ions
c.
electrons
b.
Lewis structures
d.
dipoles
 

 8. 
In drawing a Lewis structure, each nonmetal atom except hydrogen should be surrounded by
a.
2 electrons.
c.
8 electrons.
b.
4 electrons.
d.
10 electrons.
 

 9. 
What is the correct Lewis structure for hydrogen chloride, HCl?

mc009-1.jpgmc009-2.jpg
a.
A
c.
C
b.
B
d.
D
 

 10. 
How many atoms of fluorine are present in a molecule of carbon tetrafluoride, CF4?
a.
1
c.
4
b.
2
d.
5
 

 11. 
Name the compound CF4.
a.
calcium fluoride
c.
carbon tetrafluoride
b.
carbon fluoride
d.
monocalcium quadrafluoride
 

 12. 
Name the compound SiO2.
a.
silver oxide
c.
silicon dioxide
b.
silicon oxide
d.
monosilver dioxide
 

 13. 
Name the compound SO3.
a.
sulfur trioxide
c.
selenium trioxide
b.
silver trioxide
d.
sodium trioxide
 

 14. 
Name the compound N2O3.
a.
dinitrogen oxide
c.
nitric oxide
b.
nitrogen trioxide
d.
dinitrogen trioxide
 

 15. 
What is the formula for silicon dioxide?
a.
SO2
c.
Si2O
b.
SiO2
d.
S2O
 

 16. 
What is the formula for dinitrogen trioxide?
a.
Ni2O3
c.
N2O6
b.
NO3
d.
N2O3
 

 17. 
What is the formula for sulfur dichloride?
a.
SCl
c.
S2Cl
b.
SCl2
d.
S2Cl2
 

 18. 
What is the formula for diphosphorus pentoxide?
a.
P2PeO5
c.
P2O4
b.
PO5
d.
P2O5
 

 19. 
What is the formula for hydrochloric acid?
a.
HF
c.
HClO
b.
HCl
d.
H2CO3
 

 20. 
Carbon shows a very strong tendency to form
a.
ionic bonds.
c.
hydrogen bonds.
b.
covalent bonds.
d.
highly polar bonds.
 

 21. 
How many covalent bonds can a carbon atom usually form?
a.
2
c.
4
b.
3
d.
5
 

 22. 
What do all organic compounds contain?
a.
hydrogen
c.
oxygen
b.
water
d.
carbon
 

 23. 
Organic compounds are defined as all covalently bonded compounds containing carbon except
a.
oxides and carbonates.
c.
ethers and esters.
b.
alcohols and acids.
d.
aldehydes and ketones.
 

 24. 
Which hydrocarbons have six-membered carbon rings and delocalized electrons?
a.
alkanes
c.
alkynes
b.
alkenes
d.
aromatic hydrocarbons
 

 25. 
Each carbon atom in a molecule forms four single covalent bonds with other atoms in a(n)
a.
aromatic hydrocarbon.
c.
structural isomer.
b.
saturated hydrocarbon.
d.
geometric isomer.
 

 26. 
Hydrocarbons in which carbon atoms are connected by only single bonds in straight chains or branched chains are called
a.
aromatic hydrocarbons.
c.
alkenes.
b.
alkynes.
d.
alkanes.
 

 27. 
Which of the following is an alkane?
a.
propyne
c.
propene
b.
propane
d.
propyl bromide
 

 28. 
Which of the following is an atom or a group of atoms responsible for the specific properties of an organic compound?
a.
isomer
c.
substituted hydrocarbon
b.
hydrocarbon
d.
functional group
 

 29. 
What is the functional group in carboxylic acids?
a.
–COOH
c.
–CO
b.
–OH
d.
–O–
 

 30. 
What is the name of the functional group –OH?
a.
hydroxyl group
c.
carboxyl group
b.
amine group
d.
hydroxide ion
 

 31. 
What is the formula of the carboxyl group?
a.
–CHO
c.
–OH
b.
–COOH
d.
–CO
 

 32. 
Which of these elements does not exist as a diatomic molecule?
a.
Ne
c.
H
b.
F
d.
I
 

 33. 
How do atoms achieve noble-gas electron configurations in single covalent bonds?
a.
One atom completely loses two electrons to the other atom in the bond.
b.
Two atoms share two pairs of electrons.
c.
Two atoms share two electrons.
d.
Two atoms share one electron.
 

 34. 
Which of the following elements can form diatomic molecules held together by triple covalent bonds?
a.
carbon
c.
fluorine
b.
oxygen
d.
nitrogen
 

 35. 
Which of the following diatomic molecules is joined by a double covalent bond?
a.
mc035-1.jpg
c.
mc035-3.jpg
b.
mc035-2.jpg
d.
mc035-4.jpg
 

 36. 
Sulfur hexafluoride is an example of a ____.
a.
monatomic ion
c.
binary compound
b.
polyatomic ion
d.
polyatomic compound
 

 37. 
What is the ending for the names of all binary compounds, both ionic and molecular?
a.
-ide
c.
-ade
b.
-ite
d.
-ate
 

 38. 
Binary molecular compounds are made of two ____.
a.
metallic elements
c.
polyatomic ions
b.
nonmetallic elements
d.
cations
 

 39. 
In naming a binary molecular compound, the number of atoms of each element present in the molecule is indicated by ____.
a.
Roman numerals
c.
prefixes
b.
superscripts
d.
suffixes
 

 40. 
Which of the following correctly shows a prefix used in naming binary molecular compounds with its corresponding number?
a.
deca-, 7
c.
hexa-, 8
b.
nona-, 9
d.
octa-, 4
 

 41. 
Which of the following is a binary molecular compound?
a.
BeHCOmc041-1.jpg
c.
AgI
b.
PClmc041-2.jpg
d.
MgS
 

 42. 
When naming acids, the prefix hydro- is used when the name of the acid anion ends in ____.
a.
-ide
c.
-ate
b.
-ite
d.
-ic
 

 43. 
Which of the following shows both the correct formula and correct name of an acid?
a.
HClOmc043-1.jpg, chloric acid
c.
Hmc043-3.jpgPOmc043-4.jpg, phosphoric acid
b.
HNOmc043-2.jpg, hydronitrous acid
d.
HI, iodic acid
 

 44. 
What is the name of Hmc044-1.jpgSOmc044-2.jpg?
a.
hyposulfuric acid
c.
sulfuric acid
b.
hydrosulfuric acid
d.
sulfurous acid
 

 45. 
When the name of an anion that is part of an acid ends in -ite, the acid name includes the suffix ____.
a.
-ous
c.
-ate
b.
-ic
d.
-ite
 

 46. 
What is the formula for sulfurous acid?
a.
Hmc046-1.jpgSOmc046-2.jpg
c.
Hmc046-5.jpgSOmc046-6.jpg
b.
Hmc046-3.jpgSOmc046-4.jpg
d.
Hmc046-7.jpgS
 

 47. 
What is the formula for phosphoric acid?
a.
Hmc047-1.jpgPOmc047-2.jpg
c.
HPOmc047-5.jpg
b.
Hmc047-3.jpgPOmc047-4.jpg
d.
HPOmc047-6.jpg
 

 48. 
What is the formula for hydrosulfuric acid?
a.
Hmc048-1.jpgSmc048-2.jpg
c.
HSOmc048-5.jpg
b.
Hmc048-3.jpgSOmc048-4.jpg
d.
Hmc048-6.jpgS
 

 49. 
Select the correct formula for sulfur hexafluoride.
a.
Smc049-1.jpgFmc049-2.jpg
c.
Fmc049-5.jpgSmc049-6.jpg
b.
Fmc049-3.jpgSOmc049-4.jpg
d.
SFmc049-7.jpg
 

 50. 
Suppose you encounter a chemical formula with H as the cation. What do you know about this compound immediately?
a.
It is a polyatomic ionic compound.
c.
It is a base.
b.
It is an acid.
d.
It has a mc050-1.jpg1 charge.
 



 
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