Chemistry (Chang), 10th Edition

Chapter 21: Nonmetallic Elements and Their Compounds

Self Assessment A

1
In which compound does the hydrogen atom have a negative charge?
A)NH3
B)B2H6
C)CaH2
D)HCl
E)CH4
2
One important feature of the chemistry of carbon is:
A)its ability to catenate
B)its large radius that allows other atoms to fit easily around it
C)its ability to form multiple bonds with hydrogen
D)its low electronegativity that allows it to ionize easily
E)B and C are both correct
3
The chemical formula of the carbide ion is:
A)C2- or C2-
B)CN-
C)C4+
D)C3-
E)C22- or C4-
4
Dinitrogen monoxide (nitrous oxide, N2O) is:
A)a brown poisonous gas that is one of the chemicals involved in the production of photochemical smog
B)a colorless gas that decomposes into nitrogen and oxygen upon heating
C)a colorless gas used in the production of nitric acid
D)the product of nitrogen fixation in the atmosphere
E)a colorless gas used in the manufacture of explosives
5
Which of the following contains a tetrahedral arrangement of phosphorus atoms?
A)P4O6
B)P4
C)P4O10
D)A and C
E)All of the above
6
Carbon dioxide is used in all of the following ways except:
A)to provide the "bite" in soft drinks
B)in fire extinguishers
C)as a refrigerant
D)in the Frasch process
E)in the manufacture of soda ash
7
Nitric acid and sulfuric acid are both powerful oxidizing agents because:
A)the central elements (N and S) are in high oxidation states
B)the central elements (N and S) have low oxidation states
C)the elements nitrogen and sulfur are very stable
D)both compounds can be obtained in highly concentrated forms
E)More information would have to be given to answer the question
8
The chemical formula for the superoxide ion is:
A)O-
B)O22-
C)O2-
D)O3-
E)O2-
9
The Frasch process is used to:
A)mine elemental sulfur
B)remove traces of water from organic solvents
C)oxidize sulfides of many metals to the corresponding sulfates
D)manufacture freon
E)manufacture nitric acid
10
The halogens are:
A)strong acids
B)oxidizing agents
C)reducing agents
D)strong bases
E)not very reactive
11
Which of the nitrogen oxides has the lowest oxidation number?
A)nitrous oxide
B)nitric oxide
C)nitrogen dioxide
D)none of the above
12
Which form of hydrogen is used in research because of its radioactivity?
A)hydrogen(1H)
B)deuterium(2H)
C)tritium(3H)
D)none of the above
13
Which of the halogens is important to living organisms and cooking utensils?
A)Iodine
B)Bromine
C)Chlorine
D)Fluorine
14
Which of the carbon containing compounds is not correctly paired?
A)Carbides; strong bases
B)Carborundum; mainly used in jewelry
C)Cyanide; usually toxic
D)None of the above
15
What do nitrogen and phosphorus not have in common?
A)As gaseous compounds, both are used as anesthetics.
B)Both are found in organic molecules such as DNA and RNA.
C)Both are used for explosives.
D)None of the above.
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