# Which set of conditions represents the easiest way to liquefy a gas?A.low temperature and high pressureB.high temperature and low pressureC.low temperature and low pressureD.high temperature and high pressure

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Hint: Liquefaction process is defined as the process used for generating liquid either from solid or gas. Here we are going to discuss the liquefaction process converting gas into liquid.

For liquefaction of gas, it requires cooling as well as compression. Gas which shows positive deviation from compressibility factor $(z)$ will show both cooling and compression.