Problem- Which of the following statements are incorrect? 1. A liquid boils when its vapor pressure is equal to the pressure above its surface. 2. Above the critical pressure and critical temperature, only the solid phase of a pure substance can exist. 3. The gas, liquid, and solid phases can all coexist at the critical point.

1 only

2 only

3 only

2 and 3

Determine the solution for the above problem express your work in detail