MCAT General Chemistry Question 205: Answer and Explanation
Home > MCAT Test > MCAT general chemistry practice tests
Test Information
- Use your browser's back button to return to your test results.
- Do more MCAT general chemistry practice tests.
Question: 205
3. In the following phase transition diagram, Substance X is in the solid phase during Segment A and in the gas phase during Segment C. What process is occurring during Segment B?
- A. The substance is warming.
- B. The substance is cooling.
- C. Sublimation
- D. Condensation
Correct Answer: C
Explanation:
C Substance X is changing from a solid to a gas during Segment B. This is an example of sublimation. Note that choices A and B cannot be correct answer choices because the temperature of Substance X remains constant during Segment B. Condensation occurs when a gas becomes a liquid, so choice D is eliminated.