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Chemistry
Q:
The number of diastereoisomers possible for [Co(en)2Cl2]+ is ________.
Q:
The formula for tetraamminedichlorochromium(III) chloride is ________.
Q:
Polydentate ligands are known as ________ agents.
Q:
The coordination number of platinum in Pt(NH3)2Cl2 is ________.
Q:
The oxidation state of chromium in Cr2O72" is ________.
Q:
The small sizes of third transition series atoms is referred to as the ________ contraction.
Q:
Using shorthand notation, the electron configuration of Co3+ is ________.
Q:
Transition elements are located in the ________-block of the periodic table.
Q:
Which ion would you expect to have the largest crystal field splitting, â–³?A) [Rh(CN)6]4-B) [Rh(CN)6]3-C) [Rh(H2O)6]2+D) [Rh(H2O)6]3+
Q:
Which of the following species is diamagnetic?
A) an isolated, gas-phase Cr3+ ion
B) a high-spin octahedral Cr2+ complex
C) an isolated, gas-phase Cu2+ ion
D) a low-spin octahedral Co3+ complex
Q:
What statement about nitrogen is not consistent with its chemistry?
A) It is a colorless, odorless, tasteless gas.
B) It makes up 78% of the earth's atmosphere by volume.
C) It is the most volatile component of liquid air with a boiling point of -196C.
D) It readily reacts with hydrogen to form NH3 that is used in fertilizers.
Q:
What is the most stable oxidation state for Bi in bismuth compounds?
A) -3
B) 0
C) +3
D) +5
Q:
Which element of group 5A has the most basic oxide?
A) N
B) P
C) As
D) Bi
Q:
Which element of group 5A has the highest melting point?
A) nitrogen
B) white phosphorus
C) antimony
D) bismuth
Q:
Which of the following species has its N atom or atoms in the -1 oxidation state?
A) N2H4
B) NH2OH
C) N2O
D) HONO
Q:
What is the range of oxidation states that are exhibited by P?
A) from -3 to 0
B) from -3 to +3
C) from -3 to +5
D) from 0 to +5
Q:
White tin is the high temperature form of the metal. Given that the density of gray tin is 5.769 g/cm3 and that of white tin is 7.28 g/cm3 raising the pressure will favor the
A) more dense allotrope and lower the transition temperature of 13.2C.
B) more dense allotrope and raise the transition temperature of 13.2C.
C) less dense allotrope and lower the transition temperature of 13.2C.
D) less dense allotrope and raise the transition temperature of 13.2C.
Q:
Mica cleaves into thin sheets because at the molecular level its structure is
A) one dimensional.
B) two dimensional.
C) three dimensional.
D) none of the above
Q:
What is the charge, n, in the ion Si4O10n that is found in talc?A) 2 -B) 4 -C) 8 -D) 10 -
Q:
Which one of the following has a two-dimensional layer structure?
A) silica, SiO2
B) zircon, ZrSiO4
C) talc, Mg3(OH)2(Si4O10)
D) tremolite asbestos, Ca2Mg5(Si4O11)(OH)2
Q:
SiO2 can be classified as a(n)
A) amorphous solid.
B) covalent network solid.
C) ionic solid.
D) molecular solid.
Q:
What is the basic building block of all silicates?
A) Si2O64-
B) Si
C) SiO2
D) SiO44-
Q:
Approximately 90% of the Earth's crust is composed of what type of compounds?
A) carbonates
B) oxides
C) silicates
D) sulfides
Q:
Which statement is most inconsistent with the chemistry of silicon?
A) In nature, it is generally found combined with oxygen in SiO2 and in various silicate minerals.
B) It crystallizes in a diamond-like structure and does not form the graphite-like allotrope.
C) It is a hard, gray, semiconducting solid that melts at 1414C.
D) It is obtained by oxidation of silica sand with coke.
Q:
What is the oxidation number of carbon in CaC2?A) + 4B) + 1C) - 1D) - 2
Q:
Which compound has carbon with a negative oxidation number?
A) CO2
B) CaC2
C) HCN
D) Na2CO3
Q:
What is not a reaction commonly associated with cyanide ion?A) H+(aq) + CN-(aq) -> HCN(aq)B) Ag+(aq) + CN-(aq) -> AgCN(s)C) 4 Au(s) + 8 CN-(aq) + O2(g) + 2 H2O(l) -> 4 Au(CN)2-(aq) + 4 OH-(aq)D) CN-(aq) + H2(g) -> HCN(aq) + H-(aq)
Q:
What is not a reaction commonly associated with carbon dioxide?A) Oxyhemoglobin + CO2 Carboxyhemoglobin + O2B) C6H12O6(aq) + 6 O2(g) 6 CO2(g) + 6 H2O(l)C) CaCO3(s) + heat -> CaO(s) + CO2(g)D) CO2(g) + H2O(l) H+(aq) + HCO3-(aq)
Q:
What statement is inconsistent about carbon monoxide?
A) It is a colorless, odorless and toxic gas.
B) It is formed by burning carbon or hydrocarbon in excess oxygen.
C) One of its main industrial uses is in the synthesis of methanol, CH3OH.
D) Toxicity of CO results from its ability to bond strongly to iron(II) atom in hemoglobin.
Q:
Which carbon containing compound is an inorganic compound?
A) C7H7NO2
B) CO2
C) CH3CO2H
D) C6H5CN
Q:
Which one of the following is the best electrical conductor?
A) C (diamond)
B) C (graphite)
C) P4
D) S8
Q:
What statement is inconsistent about fullerene?
A) It is an allotrope of carbon and the C60 form has soccer ball shape.
B) The C60 form of fullerene is a good oxidizing agent.
C) The C60 fullerene is a molecular substance.
D) The C60 form of fullerene is soluble in nonpolar organic solvents.
Q:
Electrical conductivity in graphite is maximized
A) parallel to the pi framework and parallel to the planar C atom framework.
B) perpendicular to the pi framework and parallel to the planar C atom framework.
C) parallel to the pi framework and perpendicular to the planar C atom framework.
D) perpendicular to the pi framework and perpendicular to the planar C atom framework.
Q:
What statement is inconsistent about graphite?
A) Carbon sheets are separated by a distance of 335 pm and are held together by weak London dispersion forces.
B) Electrical conductivity parallel to the planar sheets is 1020 times greater than the conductivity of diamond.
C) Pi electrons are delocalized and free to move perpendicular to the plane of the hexagonal sheets.
D) A two-dimensional sheetlike structure in which each C atom uses sp2 hybrid orbitals.
Q:
What statement is inconsistent about diamond?
A) A covalent network structure in which each C atom uses sp3 hybrid orbitals.
B) A tetrahedral array of σ bonds with bond lengths of 154 pm.
C) The hardest known substance with the highest melting point for an element.
D) When an electrical potential is applied diamond becomes a valuable semiconductor.
Q:
Carbon is the ________ most abundant element by mass in living organisms.
A) first
B) second
C) third
D) fourth
Q:
Which allotrope of carbon has the atoms arranged in a spherical array?
A) coke
B) diamond
C) fullerene
D) graphite
Q:
Which of the following chlorides is the most ionic?
A) CH2Cl2
B) CCl4
C) PbCl2
D) PbCl4
Q:
Which statement is not consistent with the chemistry of group 4A elements?
A) Elements have the outer valence electron configuration of ns2np2.
B) The most common oxidation state for the elements of the group is +4.
C) The +4 oxidation state compounds are ionic and the +2 oxidation state compounds are covalent.
D) The +2 oxidation state for lead is the most stable.
Q:
Which element of group 4A has the greatest electronegativity?
A) C
B) Si
C) Ge
D) Sn
Q:
Which element of group 4A has the greatest density?
A) C
B) Ge
C) Sn
D) Pb
Q:
Which element of group 4A is the most abundant in the earth's crust?
A) C
B) Si
C) Sn
D) Pb
Q:
Which element of group 4A has the highest melting point?
A) C
B) Si
C) Sn
D) Pb
Q:
What is the ground state valence shell electron configuration of a group 4A element?
A) ns0 np4
B) ns1 np3
C) ns2 np2
D) ns2 np4
Q:
Some commercial drain cleaners contain aluminum chips and sodium hydroxide pellets. When water is added to this mixture a vigorous reaction takes place which is best represented asA) 2 Al(s) + 6 H+(aq) -> 2 Al3+(aq) + 3 H2(g).B) 2 Al(s) + 2 OH-(aq) + 6 H2O(l) -> 2 Al(OH)4-(aq) + 3 H2(g).C) 2 Al(s) + 6 H2O(l) -> 2 Al(OH)3 + 3 H2(g).D) 2 Al(s) + 3 Cu2+(aq) -> 2 Al3+(aq) + 2 Cu(s).
Q:
Which is not a facile reaction of aluminum?A) 2 Al(s) + 3 Br2(g) -> 2 AlBr3(s)B) 4 Al(s) + 3 O2(g) -> 2 Al2O3(s)C) 2 Al(s) + N2(g) -> 2 AlN(s)D) 2 Al(s) + 6 H2O(l) -> 2 Al(OH)3 + 3 H2(g)
Q:
What is the hybridization of boron in diborane B2H6?
A) sp
B) sp2
C) sp3
D) none of these
Q:
Compared to the terminal B"H bonds the bridging H"B bonds in B2H6 are
A) longer and stronger.
B) longer and weaker.
C) shorter and stronger.
D) shorter and weaker.
Q:
Which compound contains hydrogen atoms that form two types of bonds?
A) B2H6
B) C2H2
C) C6H6
D) N2H4
Q:
Which one of the following compounds contains a three-center, two electron (3c-2e) bond?
A) B2H6
B) C2H4
C) N2H4
D) H2O2
Q:
What is the geometric structure of BF3 and the hybridization of the B atom?
A) trigonal planar and sp2 hybridization
B) trigonal planar and sp3 hybridization
C) pyramidal and sp2 hybridization
D) tetrahedral and sp3 hybridization
Q:
The strongest reducing agent in the group 3A is
A) B.
B) Al.
C) Ga.
D) Tl.
Q:
Which M3+ ion of group 3A elements is the easiest to reduce?
A) B
B) Al
C) Ga
D) In
Q:
Which group 3A element has the highest electronegativity?
A) B
B) Al
C) Ga
D) In
Q:
Which elements of group 3A are commonly used in semiconductors?
A) B and Al
B) Al and Ga
C) Ga and In
D) In and Tl
Q:
One of the group 3A elements is extremely toxic due to the similarities in chemistry of one of its ions to alkali metal chemistry. Which element is it?
A) B
B) Ga
C) In
D) Tl
Q:
Which group 3A element has the largest liquid range of any known element?
A) Al
B) Ga
C) In
D) Tl
Q:
Of the following elements, which has a melting point slightly above room temperature?
A) B
B) Ga
C) In
D) Tl
Q:
Which group 3A element exhibits the most nonmetallic character?
A) B
B) Ga
C) In
D) Tl
Q:
What are the common oxidation states of the Group 3A elements Al and Tl?
A) both are +3
B) +3 for Al and +1 for Tl
C) +3 for Al and both +1 and +3 for Tl
D) +3 for Al and +1, +3, and -5 for Tl
Q:
Which of the group 3A elements is the only one to readily form a +1 ion?
A) B
B) Al
C) In
D) Tl
Q:
What is the geometric structure of P4 molecules?
A) linear
B) rectangular
C) square planar
D) tetrahedral
Q:
Which compound exhibits pi bonding?
A) F2
B) N2
C) P4
D) S8
Q:
Which one of the following elements forms the strongest π-bonds?
A) C
B) Si
C) Ge
D) Sn
Q:
Which one of the following elements can form more than four bonds with other elements?A) NB) OC) FD) S
Q:
What is not a true statement?
A) BeO is amphoteric but the oxides of the other group 2A elements are basic.
B) B differs from other elements of group 3A by forming mainly covalent molecular compounds.
C) BF3 is a gaseous molecular halide but AlF3 is a high melting ionic solid.
D) Compounds with C=C double bonds and Si=Si double bonds are quite common.
Q:
Which one of the following compounds exhibits the strongest hydrogen bonding between its molecules?
A) HF
B) HCl
C) HBr
D) HI
Q:
Which one of the following compounds that contains a Group 5A element is least likely to exist?
A) NCl3
B) NCl5
C) PCl3
D) PCl5
Q:
Second row elements differ from heavier elements in all of the following ways except
A) atoms of second row elements are smaller.
B) atoms of second row elements have higher electronegativities.
C) heavier elements commonly form multiple bonds while second row elements cannot.
D) heavier elements have electrons in d orbitals while second row elements do not.
Q:
Which one of the following elements forms the most acidic binary oxide?
A) Na
B) C
C) N
D) P
Q:
What are the basic oxides of the following set Na2O, MgO, P4O10, SO3, and Cl2O7?
A) Na2O and MgO
B) Na2O, MgO, and P4O10
C) P4O10, SO3, and Cl2O7
D) SO3 and Cl2O7
Q:
Which of the following elements forms the most ionic binary hydride?
A) Na
B) Be
C) O
D) F
Q:
Atomic radius of main-group elements generally
A) increases from left to right across a period and increases down a group.
B) increases from left to right across a period and decreases down a group.
C) decreases from left to right across a period and increases down a group.
D) decreases from left to right across a period and decreases down a group.
Q:
Electronegativity of main-group elements generally
A) increases from left to right across a period and increases down a group.
B) increases from left to right across a period and decreases down a group.
C) decreases from left to right across a period and increases down a group.
D) decreases from left to right across a period and decreases down a group.
Q:
Ionization energy of main-group elements generally
A) increases from left to right across a period and increases down a group.
B) increases from left to right across a period and decreases down a group.
C) decreases from left to right across a period and increases down a group.
D) decreases from left to right across a period and decreases down a group.
Q:
Among the main-group elements the number of semimetals is
A) five.
B) six.
C) seven.
D) eight.
Q:
Which of the following elements exhibits the most metallic character?
A) Ga
B) Ge
C) As
D) Se
Q:
What is the most metallic element of group 4A?
A) Si
B) Ge
C) Sn
D) Pb
Q:
Metallic character for the main group elements generally
A) increases from left to right across a period and increases down a group.
B) increases from left to right across a period and decreases down a group.
C) decreases from left to right across a period and increases down a group.
D) decreases from left to right across a period and decreases down a group.
Q:
As one traverses the periodic table from left to right, the effective nuclear charge Zeff increases. As a result of this the periodic properties of
A) atomic size increases, IE increases, EA increases and electronegativity increases.
B) atomic size decreases, IE increases, EA increases and electronegativity increases.
C) atomic size decreases, IE decreases, EA increases and electronegativity increases.
D) atomic size decreases, IE increases, EA decreases and electronegativity increases.