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 of the following is not a characteristic of 'solid'?
Which among the following is NOT an example of matter?
Identify the element that is NOT a metalloid.
What is called conversion from a liquid state to a gaseous state?
A. Oxidization
B. Sublimation
C. Evaporation
D. Condensation
The gases obtained on heating FeSO4 are-
