Chapter 24 Practice Test Flashcards
In which of the following compounds would you expect to find only polar covalent bonds?
PBr3
Complete the following analogy:
Ammonia : phosphine :: methane : _________________
Silane
Which of these compounds contains only sigma (σ) bonds?
S8
Which reaction shows how hydrogen is formed in the water-gas shift reaction?
CO + H2O —> CO2 + H2
Which is not a binary hydride?
OH-
What is the product of the Haber-Bosch process?
NH3(g)
What is the common name of the carbonate salt, Na2CO3?
Washing soda
Which of the following is not an allotrope of carbon?
Cyanide
How many carbon atoms comprise a buckminsterfullerene?
60
How many carbon atoms comprise a buckminsterfullerene?
27.7%
Which percentage of the mass of the earth’s crust is composed of oxygen?
46.4%
Identify and arrange in the correct order the steps involved in the process of producing nitric acid using the Ostwald method.
- 2NO + O2 → 2NO2
- 4NH3 + 5O2 → 4NO + 6H2O
- 3NO2 + 3H2O → 2HNO3 + NO
- NH3 + 2O2 → HNO3 + H2O
2, 1, 3
Ammonium nitrite decomposes upon heating into nitrogen gas and water. How much nitrogen gas is produced when 3.00 grams of solid ammonium nitrite is heated at 235°C and 1.10 atm?
1.78 L
Which compound contains phosphorus in the +3 oxidation state?
H3PO3
Which of the following Group 15 (VA) elements is NEVER found uncombined in nature?
P
Arrange the following binary oxides in order of increasing covalent character:
Oxides: SO2, MgO, PbO2, and F2O
MgO < PbO2 < SO2 < F2O
Oxygen typically reacts with nonmetals to form oxides that are acidic in water. Which of the following nonmetal oxides does not act as an acid in water?
N2O
Nitrogen and oxygen form diatomic molecules. What type of molecules does sulfur usually form?
Polyatomic
Why does sulfuric acid form both sulfates and bisulfates?
The second dissociation of sulfuric acid is not complete.
Which halogen is most reactive?
Fluorine
Which of the following is not a property of the halogens?
Valence configuration of ns2np3
Although HF is a weak acid, it is commercially important because it is one of very few substances that will react with _____.
glass
Which is a balanced equation for the production of chlorine gas?
2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + H2(g) + Cl2(g)
Which of the following is TRUE regarding xenon oxyfluorides?
They are unstable.
What noble gas is produced by alpha decay?
Helium
