7. For Figure 10-1A, the portion of the graph during which the substance is all solid is represented by interval: a. A-B
b. D-E
C-D
d. E-F

8. The minimum time required for the substance in Figure 10-1A to change from all gas to all liquid is:
a.30 minutes.
b. 12 minutes.
c. 8 minutes.
d. 7 minutes.

9. The boiling point of the substance Figure 10-1A is:
a. 40°C
b. 130°C
c. 230°C
d. 300°C

10. The melting point of the substance in Figure 10-1A is:
a. 40°C
b. 130°C
c. 230°C
d. 300°C