Question

For liquefaction of gas :

• A. Temperature and pressure should be high
• B. Temperature should be low and pressure should be high
• C. Temperature and pressure should be low
• D. Temperature should be high and pressure should be low.

Answer 1

The correct option is B

Temperature should be low and pressure should be high

Correct Answer: Option (B)- The temperature should be low and the pressure should be high.

An explanation for the correct answer:

1. liquefaction of gas: The conversion of a gas into a liquid is known as the liquefaction of gas.
2. The intermolecular forces of attraction will increase while converting gas to a liquid. As the intermolecular forces of attraction increase, the molecules come together and combine to form a liquid state.
3. Lowering the temperature: We can convert the gas molecules to a liquid by cooling the gas molecules. As we lower the temperature of the gas molecules, the kinetic energy of the gas molecules decreases and thus, the gas molecules are converted to liquid.
4. Applying high pressure: When we apply high pressure to gas molecules, the gas molecules get compressed. On compression, the intermolecular distance between the gas molecules decreases.
5. The combination of high pressure and low temperature makes the gas molecules come closer and have low kinetic energy, which leads the gas to become a liquid.

Thus, the correct option is (B). The temperature should be low and the pressure should be high.