Question

Boiling occurs at ________ temperature and _______ pressure, the process appears as a point in ____ diagram.

(a) Constant, constant, P-T

(b) Variable, constant, P-T

(c) Constant, variable, V-T

(d) Variable, variable, V-T

The question was posed to me in exam.

The doubt is from Phase diagrams and Phase Rule-II topic in chapter Multiphase Equilibrium of Chemical Process Calculation

Answer 1

Right option is (a) Constant, constant, P-T

The explanation is: Boiling occurs at constant temperature and constant pressure, the process appears as a point in P-T diagram.