Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
6) Which compound would produce an acidic aqueous solution?
A) HF
B) MgH2
C) C2H2
D) KH
E) H2
7) The oxidation state of sulfur in the SO3 molecule is ________.
A) +6
B) +2
C) -2
D) +4
E) 0
8) The oxidation state of phosphorous in the PF5 molecule is ________.
A) +5
B) +4
C) -5
D) +6
E) 0
9) The oxidation state of chlorine in the ClO- molecule is ________.
A) +1
B) +3
C) +4
D) +5
E) -1
10) Which one of the following compounds is superoxide?
A) NaO2
B) Na2O
C) Na2O2
D) NaOH
E) H2O
11) Which compound would produce a basic aqueous solution?
A) KH
B) H2S
C) C2H6
D) CH3OH
E) H2O
12) What is the F—Xe—F bond angle in XeF2?
A) 180°
B) 90°
C) 109.5°
D) 120°
E) 60°
13) The oxidation number of xenon in XeF4 is ________.
A) +4
B) +3
C) +5
D) +1
E) -6
14) Which equation correctly represents the reaction between elemental chlorine and sodium iodide?
A) Cl + NaI → I + NaCl
B) Cl- + NaI → I- + NaCl
C) Cl2 + 2NaI → I2 + 2NaCl
D) Cl + NaI → 1/2 I2 + NaCl
E) Cl2 + NaI → NaCl2 + I-
15) Which one of the following compounds is peroxide?
A) Li2O2
B) Li2O
C) LiO2
D) both Li2O2 and LiO2
E) H2O
16) The oxidation state of oxygen in O2F2 is ________.
A) +1
B) -1
C) +2
D) 0
E) -2
17) The molecular shape of the SF2 molecule is ________.
A) bent
B) tetrahedral
C) linear
D) trigonal planar
E) trigonal pyramidal
18) The oxidation state of nitrogen in the NO2 molecule is ________.
A) +4
B) +3
C) +5
D) +2
E) -3
19) The oxidation state of As in the As2O3 molecule is ________.
A) 3
B) 2
C) 4
D) -3
E) 0
20) The oxidation number of B in B2O3 is ________.
A) +3
B) +2
C) +1
D) +4
E) +5
21) Which of the following is the nitride ion?
A) N3-
B) N3-
C) NO3-
D) N-
E) NO2-
37
22) Which pair of formula/name is incorrect?
A) NO2 / dinitrogen oxide
B) N2O / nitrous oxide
C) NO / nitric oxide
D) N2O4 / dinitrogen tetroxide
E) N2O5 / dinitrogen pentoxide
23) The molecular shape of the PF3 molecule is ________.
A) trigonal pyramidal
B) trigonal bipyramidal
C) see-saw
D) T-shaped
E) octahedral
24) How many pairs of unpaired electrons are there in one molecule of dinitrogen monoxide?
A) 4
B) 3
C) 5
D) 2
E) 1
1) What are the five crystalline allotropes of carbon?
2) Of Li, K, P and Ne which is the least electronegative?
3) In a proton transfer reaction the weaker a Br∅nsted-Lowry acid the ________ is its conjugate.
38
4) D2O is known as ________.
5) H2 is reacted with ________ to produce methanol.
6) What noble gas is radioactive?
7) Of the nonradioactive halogens, which is the largest?
8) What halogen, other than astatine, is not usually found in seawater?
9) In a hypohalous acid, the oxidation state of the halogen is ________.
10) Write the correctly balanced equation for the reaction between elemental fluorine and sodium iodide.
11) Write the correctly balanced equation for the reaction between elemental iodine and sodium bromide.
39
12) The acid and salts of which halogen-oxyanion are the most stable?
13) What anion containing Cl is used as a rocket fuel?
14) Astatine decays by ________.
15) What is the oxidation state of oxygen in the superoxide ion?
16) In a discussion of oxygen compounds, a disproportionation reaction is ________.
17) What process replenishes O2?
18) I am a highly polar, strongly hydrogen-bonded liquid with a density of 1.47 g/cm3. I can decompose
to form O2. Who am I?
19) If a metal forms more than one oxide, the acidic character of the oxide increases as the oxidation state
of the metal ________.
20) What sulfur gas is used to sterilize wine?
21) The electrical conductivity of ________ is low in the dark, but increases on exposure to light.
22) The danger from mixing ammonia with bleach is the production of ________.
23) KNO3 and NaNO3 are also known as ________.
24) What is the primary commercial source of elemental nitrogen?
25) What group 5A element is the most metallic?
26) Low levels of arsenic consumption can lead to ________ or bladder cancer.
27) Why does calcium carbonate dissolve in water containing carbon dioxide?
28) The balanced equation for the production of ethylene from calcium carbide is ________.
29) What is an acetylide?
30) What is meant by the term "composite"?
31) What are the principal components used in making soda-lime glass?
32) What effect does substitution of K2O for Na2O in making soda-lime glass have in its properties?
33) Chains of silicate tetrahedra are called ________.
34) Compounds containing only boron and hydrogen are called ________.
22.5 True/False Questions
1) Air containing 4% H2 can be explosive.
2) The reduction of O2 by sodium hydride produces lye.
3) Xenon can have oxidation states of 2, 4, 6, and 8.
4) The instability of xenon fluorides is due to its negative enthalpy of formation.
5) Ozone is a pale blue poisonous gas with an irritating odor.
6) All oxides are ionic compounds.
7) Oxides can react with water to form acids or bases.
8) The reduction of metal oxides uses carbon monoxide.
9) Calcium carbide is a solid source of acetylene.
22.6 Essay Questions
1) Explain why silicon does not form any allotropes with structures analogous to that of graphite or
buckminsterfullerenes, even though it is in the same group as carbon.
2) Explain why hydrofluoric acid etches glass.
3) Explain why HF (aq) is a relatively weak acid compared to other hydrohalic acids.
4) What are the three steps in the Ostwald process of nitric acid synthesis?
5) Why are nitric acid solutions sometimes yellowish?
6) Describe the major difference in the charge distribution in CH4 and SiH4.
7) Briefly explain why carbon and silicon can form oxides with such different physical properties,
gaseous CO2 and solid SiO2.
