Which of the following statements describes substances which are gases at room temperature?
A. Their boiling point is below room temperature but their melting point is above.
B. Their boiling point is above room temperature but their melting point is below.
C. Their boiling and melting points are both above room temperature.
D. Their boiling and melting points are both below room temperature.
Answer:D
Which of the following statements describes substances which are gases at room temperature?
A. Their boiling point is below room temperature but their melting point is above. B. Their boiling point is above room temperature but their melting point is below. C. Their boiling and melting points are both above room temperature. D. Their boiling and melting points are both below room temperature.