Question

Select correct statement (s):

• A. curve $VU$ is solid-liquid equilibrium curve
• B. curve $VU$ has a positive slope
• C. curve $VW$ is vapour pressure curve for liquid substance
• D. in the solid-liquid mixture of the substance, solid will float

Answer 1

Answer: (A), (B), (C)

The correct options are
A curve $VU$ is solid-liquid equilibrium curve
B curve $VU$ has a positive slope
C curve $VW$ is vapour pressure curve for liquid substance

In attached image, we can see typical phase diagram of pure substance.

So curve VU is solid-liquid equilibrium curve and it has positive slope.

Curve VW is vapour pressure curve for liquid substance or liquid vapour equilibrium curve.

In the solid-liquid mixture of the substance, solid may float or sink. It is not necessary that it will float.