"Red" Phosphorus Is Insoluble in Carbon Disulfide, Has a Broad

question 55

Multiple Choice

"Red" phosphorus is insoluble in carbon disulfide, has a broad melting range and a very low vapor pressure, and does not conduct electricity. This evidence suggests that this substance is probably:

• A) crystalline and metallic
• B) a crystal of P4 molecule units
• C) amorphous and polymeric
• D) P4+ ions in a "sea" of electrons
• E) cubic closest-packed unbonded P atoms

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Definitions:

Aqueous Solution

A solution in which water is the solvent and can dissolve a variety of solutes, both ionic and molecular.

Immiscible Liquids

Liquids that do not mix together to form a homogeneous solution, often separating into distinct layers when combined.

Wax

A diverse class of organic compounds that are malleable at room temperature, typically consisting of long-chain alkanes, esters, or a variety of other compounds.

Soap

A substance used for washing and cleaning, produced by the reaction of a fatty acid with an alkali.