Consider the following phase diagram of CO₂ (not to scale). At equilibrium, the INCORRECT statement is:

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GATE CY 2019 Official Paper

At 200 K, on increasing the pressure from 1 to 50 atm, CO₂ gas condenses to liquid.
It is not possible to obtain liquid CO₂ from gaseous CO₂ below 5.11 atm.
Both liquid and gas phase of CO₂ coexist at 298.15 K and 67 atm.
With increasing pressure, the melting point of solid CO₂ increases.

Answer 1

Explanation:-

If the temperature is constant at 200 K and We increase the pressure from 1 atm to 50 atm CO₂ gas will remain solid it will not liquify in any condition therefore, Statement 1 is Incorrect.

Important Points

The liquefication of a gas depends upon its critical temperature.
If the force of attraction between the particles is high then its intermolecular spaces will be less resulting easy liquefication process.
The liquefication process for gases is completed in two steps - cooling and compression.