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Moderate

Semiconductors and Electrical Conductivity

APCHEM-CBL1HD

Consider the descriptions that follow for two solids: X and Y.

Solid X: Exhibits low to moderate electrical conductivity at room temperature; conductivity increases with increasing temperature.

Solid Y: Good electrical conductivity at room temperature; conductivity decreases with increasing temperature.

Based on this information, which of the following statements is TRUE concerning the two solids?

A

Both X and Y are semiconductors.

B

Neither X nor Y is a semiconductor.

C

X is a semiconductor; Y is not.

D

Y is a semiconductor; X is not.