Question

Is my answer correct?

Refer to the phase diagram of substance X. Which statement below is NOT TRUE about the diagram?

A. Substance X is in the solid phase in the area shown by “1”.


B. Substance X exists as a solid, a liquid and a gas at point D.
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C. Substance X is undergoing a change from a liquid to a gas at the line shown by E. ***** This is my answer*****


D. Substance X is a liquid in the area shown by "2".

Answer 1

yes you are right .. X is undergoing a change from solid to gas at point E

Answer 2

Yes you are right as from the phase diagram it can be seen :

A. Substance X is in the solid phase in the area shown by “1”.

B. Substance X exists as a solid, a liquid and a gas at point D.

D. Substance X is a liquid in the area shown by "2"

But the point C is not correct as Substance X is not undergoing a change from a liquid to a gas at the line shown by E while it undergoes a phase change from solid to gas.