- Chemical Engineering Basics - Section 1
- Chemical Engineering Basics - Section 2
- Chemical Engineering Basics - Section 3
- Chemical Engineering Basics - Section 4
- Chemical Engineering Basics - Section 5
- Chemical Engineering Basics - Section 6
- Chemical Engineering Basics - Section 7
- Chemical Engineering Basics - Section 8
- Chemical Engineering Basics - Section 9
- Chemical Engineering Basics - Section 10
- Chemical Engineering Basics - Section 11
- Chemical Engineering Basics - Section 12
- Chemical Engineering Basics - Section 13
- Chemical Engineering Basics - Section 14
- Chemical Engineering Basics - Section 15
- Chemical Engineering Basics - Section 16
- Chemical Engineering Basics - Section 17
- Chemical Engineering Basics - Section 18
- Chemical Engineering Basics - Section 19
- Chemical Engineering Basics - Section 20
- Chemical Engineering Basics - Section 21
- Chemical Engineering Basics - Section 22
- Chemical Engineering Basics - Section 23
- Chemical Engineering Basics - Section 24
- Chemical Engineering Basics - Section 25
- Chemical Engineering Basics - Section 26
- Chemical Engineering Basics - Section 27
- Chemical Engineering Basics - Section 28


Chemical Engineering Basics - Engineering
Q1: Which one can be directly solidified from gaseous state wihtout entering into liquid state ?A Helium
B Oxygen
C Carbon dioxide
D None of these
ANS:C - Carbon dioxide Helium can be directly solidified from the gaseous state without entering into a liquid state under standard atmospheric pressure. This process is known as "deposition" or "deposition from the gas phase." At extremely low temperatures, close to absolute zero (-273.15°C or 0 Kelvin), helium gas can be solidified directly into solid helium without passing through a liquid phase. This phenomenon occurs due to the unique properties of helium at low temperatures, where it exhibits superfluidity and undergoes a phase transition directly from gas to solid. Oxygen and carbon dioxide both undergo a phase transition from gas to liquid before solidification under standard atmospheric pressure and temperature conditions. Therefore, helium is the only option among the given choices that can be directly solidified from the gaseous state without entering into a liquid state. |


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