JEE Main 2025 Jan 28 Shift 1, Chemistry Q9: Properties of Solids
Ice and water are placed in a closed container at a pressure of 1 atm and temperature 273.15 K. If pressure of the system is increased 2 times, keeping temperature constant, then identify correct observation from following :
- A
Volume of system increases.
- B
Liquid phase disappears completely.
- C
The amount of ice decreases.
- D
The solid phase (ice) disappears completely.
At 1 atm and 273.15 K the system sits on the solid–liquid coexistence line for water. For water the solid–liquid boundary has a negative slope: increasing pressure at constant temperature pushes the system into the liquid region of the phase diagram.
So raising the pressure to 2 atm at 273.15 K shifts the equilibrium so that all the ice melts. The solid phase disappears and only liquid water remains.
Option (4) is correct.
Concept behind this question
Properties of SolidsNotes, formulas and examples →Practice more Chemistry
Concept-wise practice with instant solutions on Fundamenthol.
Start practicing →