Question

Which is the most easily liquefiable rare gas?
A.\[Ar\]
B.\[Ne\]
C.\[Xe\]
D.\[Kr\]

Answer 1

Hint: The gases given in the question are Noble or inert. They are non-flammable gases that are colourless, odourless, and tasteless.

Complete Step by Step Solution:
Liquid air is made out of air that has been cooled to extremely low temperatures (cryogenic temperatures) and condensed into a pale blue mobile liquid. It's stored in special containers to avoid becoming too warm at room temperature (vacuum insulated flasks are often used). It's commonly used for condensing and/or solidifying other chemicals, as well as providing an industrial supply of nitrogen, oxygen, argon, and other inert gases through an air separation process.

The Joule–Thomson effect is a thermodynamic phrase that describes how a real gas or liquid changes temperature when forced through a valve or porous stopper while being separated from the outside world. This procedure is known as the throttling process, also known as the Joule–Thomson process.

The Joule–Thomson process cools all gases except hydrogen, helium, and neon when throttled through an orifice at ambient temperature; these three gases have the same effect but at lower temperatures. Most liquids, including hydraulic oils, will be warmed through the Joule–Thomson throttling process.

The larger the atomic scale, the more intermolecular interaction there is. (Forces of Van der Waals) Liquefaction is also easy. We know that, in the periodic table, the atomic size increases with moving down in a group. Therefore, the size of noble gases in increasing order is \[He < Ne < Ar < Kr < Xe\]. Out of these gases, xenon has the largest size. Therefore, it is easily liquefiable.

As a result, the correct answer is option C. Xenon.

Note: In physics and chemistry, the phase transitions from solid to liquid (melting and condensation, respectively) are related to liquefaction. The melting point (also known as the liquefaction point) is the temperature and pressure at which a solid becomes liquid. In commercial and industrial settings, the process of condensing a gas to a liquid is known as liquefaction of gases.