Question

Observe the P-T phase diagrams for a given substance $A$. Then melting point of $A(s)$, boiling point of $A(l)$, critical point of $A$ and triple point of $A$ (at their respective pressures) are respectively -

• A. $T_{1}, T_{2},T_{3}, T_{4}$
• B. $T_{4}, T_{3},T_{1}, T_{2}$
• C. $T_{3}, T_{4},T_{2}, T_{1}$
• D. $T_{2}, T_{1},T_{3}, T_{4}$

Answer 1

Answer: (C)

$mp \,T_{3} \to$ solid & liquid, $bpT_{4} \to$ liquid-gas
Critical point $T_{2}$, triple point $T_{1}\to$ solid liquid gas