23.1 Multiple–Choice Questions
1) Chalcocite, chalcopyrite, and malachite are sources of which metal?
2) Which mineral contains titanium?
3) A mineral is
A) a solid inorganic compound that contains one or more metals.
B) a vitamin.
C) metal in its elemental form.
D) a transition metal ion.
E) source of carbon.
4) What two oxidation states are more frequently observed in the first transition series than in the third?
A) +3 and +7
B) +2 and +3
C) +2 and +7
D) +5 and +6
E) +3 and +5
5) A substance with unpaired electrons will be
A) slightly attracted to a magnet.
B) slightly repelled by a magnet.
C) permanently magnetic.
D) brightly colored.
6) The lanthanide contraction is responsible for the fact that
A) Zr and Y have about the same radius.
B) Zr and Nb have similar oxidation states.
C) Zr and Hf have about the same radius.
D) Zr and Zn have similar oxidation states.
E) Zr and Hf have the same oxidation states.
7) Which one of the following is not true about transition metals?
A) They frequently have more than one common oxidation state.
B) Their compounds are frequently colored.
C) Their compounds frequently exhibit magnetic properties.
D) They are found in the d-block of the periodic table.
E) They typically have low melting points.
8) Which one of the following species is paramagnetic?
9) Diamagmetic solids __________.
A) have atoms with one or more unpaired electrons
B) have atoms with randomly oriented magnetic moments
C) show very slight magnetic character when placed in a magnetic field
D) have atoms with strongly aligned electrons when placed in a magnetic field
E) both a and d
10) Formation of a complex species of Mn+ metal ion with ligands often __________.
A) “masks” original chemical properties of both the Mn+ ion and the ligands
B) reduces availability of the free Mn+ ions in solution
C) may cause changes in the ease with which Mn+ is reduced or oxidized
D) alters original physical properties of Mn+
E) all of the above
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