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25 MC Problems Oxidation Numbers, Naming, General Chem

Question 1 (4 points)
In which one of the following is the oxidation state of the underlined metal incorrect?
Complex Species Oxidation State of Underlined Metal
a.[Cr(OH2)3Br3] +3
b.[Co(OH2)6](NO3)2 +2
c.[Co(NH3)2(en)(Cl)2]2SO4 +1
d.[Fe(CO)5] 0
e.[Cr(NH3)6]2[NiCl4]3 +2 Save answer
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Question 2 (4 points)
Which one of the following is always a strong field ligand?
a.Br-
b.H2O
c.F-
d.CN-
e.Cl-
Save answer
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Question 3 (4 points)
What is the name of the compound with the formula [Ti(H2O)4Cl2](NO3)2?
a.tetraaquadichlorotitanium(IV) nitrate
b.tetraaquadichlorodinitritotitanate(IV)
c.tetraaquadichlorodinitritotitanium(IV)
d.titaniumtetraaquadichloro nitrate
e.titaniumtetraaqualdichloro(IV) nitrate Save answer
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Question 4 (4 points)
Below is a list of formulas for complex compounds and ions; each is matched with its name. One formula - name combination contains an error. Which one?
Formula
Name
a.
[Ag(NH3)2]NO3 diamminesilver(I) nitrate
b.
[Fe(CN)6]3- hexacyanoiron(III) ion
c.
[Cr(OH2)6]2(SO4)3 hexaaquachromium(III) sulfate
d.
Na2[Ni(CN)4] sodium tetracyanonickelate(II)
e.
Li[AgI2] lithium diiodoargentate(I) Save answer
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Question 5 (4 points)
All of the following first transition series elements form compounds with +4 oxidation states EXCEPT
a.
scandium.
b.
titanium.
c.
vanadium.
d.
chromium.
e.
manganese. Save answer
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Question 6 (4 points)
Which of the following statements about hydrogen is false?
a.
Hydrogen occurs as a diatomic molecule.
b.
Hydrogen can be produced by the reaction of an active metal and HCl(aq).
c.
NH3, the binary hydride of nitrogen, is called ammonia.
d.
Hydrogen forms only molecular compounds.
e.
Metal hydrides are basic. Save answer
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Question 7 (4 points)
Which of the following reactions shows the formation of synthesis gas?
a.
2 H2O(g) → 2 H2(g) + O2(g)
b.
C2H6(g) → H2(g) + C2H4(g)
c.
C(s) + H2O(g) → H2(g) + CO(g)
d.
CO(g) + H2O(g) → CO2(g) + H2(g)
e.
C(s) + 2 H2(g) → CH4(g) Save answer
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Question 8 (4 points)
Write the balanced formula unit equation for the reaction of sodium hydride with water. What is the sum of the coefficients in the balanced equation? Use the smallest whole numbers possible. Don't forget coefficients of "one".
a.
three
b.
four
c.
five
d.
six
e.
eight Save answer
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Question 9 (4 points)
Metal hydrides are often used to remove traces of water from nonpolar solvents. Write a balanced chemical equation for the reaction of calcium hydride with water.
a.
CaH2(s) + 2 H2O(l) → Ca(OH)2(s) + 2 H2(g)
b.
CaH2(s) + H2O(l) → CaOH(s) + H3 O+(aq)
c.
CaH2(s) + 2 H2O(l) → Ca(s) + 2H3O +(aq)
d.
CaH2(s) + 2 H2O(l) → Ca(s) + O2(g) + 6 H+(aq)
e.
CaH2(s) + H2O(l) → CaO(s) + 4 H+ (aq) Save answer
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Question 10 (4 points)
Which of the following statements is incorrect?
a.
hardness in water is due primarily to the presence of Ca2+, Mg 2+, Fe3+ ions
b.
detergents cause eutrophication of natural water systems
c.
dissolved CO2 from the atmosphere has no effect on water hardness
d.
boiling water can reduce its hardness
e.
the addition of sodium carbonate can reduce water hardness Save answer
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Question 11 (4 points)
The solubility of carbon dioxide in water_______
a.
is affected by temperature but is not affected by air pressure because the composition of carbon dioxide in air is constant
b.
depends on Henry's Law constant, which is larger at higher temperatures and higher pressures
c.
is not affected by the prescence of HCO3- ions in the solution
d.
is greater at higher pH than at lower pH
e.
is not affected by pH Save answer
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Question 12 (4 points)
Write the formula unit equation for the hydrolysis of silicon tetrachloride. One of the products is H4SiO4. What is the sum of the coefficients?
a.
10
b.
11
c.
12
d.
13
e.
14 Save answer
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Question 13 (4 points)
Which of the following does not accurately describe elemental silicon?
a.
semiconductor
b.
shiny, blue-gray solid
c.
a brittle metalloid
d.
high melting point
e.
crystallizes in a graphite-like lattice Save answer
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Question 14 (4 points)
Write the molecular equation for the thermal decomposition of ammonium nitrate to nitrogen, oxygen, and steam above 260°C. What is the sum of the coefficients?
a.
6
b.
7
c.
8
d.
9
e.
5 Save answer
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Question 15 (4 points)
Which of the following nitrogen oxides are free radicals: N2O, NO, NO2, and N2O3?
a.
N2O and NO
b.
N2O and N2O3
c.
NO and NO2
d.
NO, NO2, and N2O3
e.
N2O, NO, NO2, and N2O3 Save answer
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Question 16 (4 points)
Nitrogen dioxide, a brown gas, is a product of the decomposition of nitric acid. Write the balanced chemical equation for this reaction.
a.
HNO3(aq) → NO 2(g) + OH-(aq)
b.
HNO3(aq) + H+(aq) → NO2(g) + H 2O(l)
c.
2 HNO3(aq) → NO(g) + NO2(g) + H2(g) + O3(g)
d.
2 HNO3(aq) → 2 NO2(g) + H2O(l) + 1/2 O2(g)
e.
3 HNO3(aq) + 5 H+(aq) → 2 NO2(g) + NO(g) + 4 H2O(l)
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Question 17 (4 points)
The following reaction can be considered a(an) __________ reaction and a __________ reaction. [Ni(OH2)6]2+ + 6NH3 → [Ni(NH3)6]2+ + 6H2O
a.
redox; Brønsted-Lowry acid-base
b.
Lewis acid-base; displacement
c.
Arrhenius acid-base; displacement
d.
Lewis acid-base; Brønsted-Lowry acid-base
e.
redox; displacement Save answer
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Question 18 (4 points)
Which of the following species is NOT involved in the phenomenon of "acid rain"?
a.
SO3
b.
NO2
c.
H2SO4
d.
CO2
e.
SO2 Save answer
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Question 19 (4 points)
Write a balanced chemical equation for the reaction of sulfur dioxide and water.
a.
SO2(g) + H2O(l) → S(s) + O2(g) + H2O(l)
b.
SO2(g) + H2O(l) → H2SO3(aq)
c.
SO2(g) + H2O(l) → SO3(g) + H2(g)
d.
SO2(g) + 2 H2O(l) → H2SO4(aq) + 2 H2(g)
e.
SO2(g) + 2 H2O(l) → SO4(g) + 2 H2(g) Save answer
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Question 20 (4 points)
A substance produced during the combustion of many fossil fuels is __________.
a.
S8
b.
H2S
c.
SO2
d.
S2Cl2
e.
CuS Save answer
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Question 21 (4 points)
Write the balanced formula unit equation for the reaction of magnesium oxide with sulfur dioxide. What is the sum of the coefficients?
a.
6
b.
8
c.
3
d.
4
e.
5 Save answer
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Question 22 (4 points)
Which of these is the correct formula for sodium iodite?
a.
NaIO2
b.
NaI
c.
NaIO
d.
NaIO4
e.
NaIO3 Save answer
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Question 23 (4 points)
Write and balance the formula unit equation for the reaction of chlorine with cold water. The sum of the coefficients in the balanced equation (include one's) is __________.
a.
6
b.
7
c.
8
d.
4
e.
5 Save answer
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Question 24 (4 points)
Which ion is not easily polarized by cations?
a.
F-
b.
Cl-
c.
Br-
d.
I-
e.
At- Save answer
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Question 25 (4 points)
Which of the following is the strongest oxidizing agent?
a.
Br2
b.
Cl-
c.
F2
d.
F-
e.
I2 Save answer
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25 MC Problems Oxidation Numbers, Naming, General Chem problems are solved with explanations.

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