Which of the following statements about decompression melting is not correct? Select one: a. The hot material melts because of an increase in temperature b. The hot material melts because of decrease in pressure c. The hot material melts because of a decrease in melting point d. The hot material will melt even without a change in temperature

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A:

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.