Solid CO2 gets converted directly into the gaseous state upon decreasing the pressure to _________.
1 atmosphere, without coming to the liquid state
The correct answer is option 4 i.e. 1 atmosphere, without coming to the liquid state.
Solid CO₂ (also called dry ice) directly converts into gas without turning into liquid when the pressure is reduced to 1 atmosphere. This process is called sublimation, which occurs because the triple point of CO₂ is 5.11 atm, meaning liquid CO₂ cannot exist below this pressure. At 1 atmosphere, solid CO₂ skips the liquid phase and changes directly into carbon dioxide gas. This property makes dry ice useful in cooling and preservation, as it leaves no liquid residue. Therefore, when pressure drops to 1 atmosphere, solid CO₂ sublimates without coming to the liquid state.
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Important Questions from States of Matter
Which is correct statement ?
According to Charle's Law, which of the following is constant?
Which of the following statements is/are correct?
I. Mass vapor is obtained in the air by evaporation and transpiration.
II. Water circulation between the oceans and the water bodies is called the water cycle.
Which of the following arenot chemical changes?
1. Tempering of iron
2. Conversion of the iron piece into an electro-magnet by passing the current around the iron
3. Melting of iron
4. Rusting of iron
Select the correct answer using the code given below:
Which of the following statements is not correct regarding matter?
