JAMB Physics 2011 Question 18

Question 18

Change of State and Vapours

The phenomenon that shows that increase in pressure lowers the melting point can be observed in

  1. A.coagulation
  2. B.regelation.
  3. C.sublimation.
  4. D.condensation.
Show the answer and explanation

Answer: B (regelation.)

Explanation

In regelation, a loaded wire presses on ice, lowering its melting point so the ice melts under the wire and refreezes above it.