Liquefaction of Gases
Chemistry ⇒ States of Matter
Liquefaction of Gases starts at 9 and continues till grade 12.
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A gas at 25°C cannot be liquefied by pressure alone. What does this indicate about its critical temperature?
A gas is cooled to below its critical temperature and then compressed. What will happen?
At what temperature (in °C) can nitrogen be liquefied at atmospheric pressure? (Critical temperature of nitrogen = -147°C)
Describe the main steps involved in the Linde process for liquefying air.
A gas at 25°C cannot be liquefied by pressure alone. What does this indicate about its critical temperature?
A gas is cooled to below its critical temperature and then compressed. What will happen?
At what temperature (in °C) can nitrogen be liquefied at atmospheric pressure? (Critical temperature of nitrogen = -147°C)
Calculate the pressure required to liquefy a gas at its critical temperature if its critical pressure is 50 atm.
Which gas is commonly liquefied and used as a refrigerant in air conditioners? (1) Ammonia, (2) Oxygen, (3) Nitrogen, (4) Hydrogen
Which law explains the effect of pressure on the volume of a gas during liquefaction? (1) Boyle's Law, (2) Charles's Law, (3) Avogadro's Law, (4) Dalton's Law
Which of the following gases has the highest critical temperature? (1) Nitrogen, (2) Oxygen, (3) Carbon dioxide, (4) Helium
Which of the following gases has the lowest critical temperature? (1) Helium, (2) Nitrogen, (3) Oxygen, (4) Carbon dioxide
Fill in the blank: The pressure required to liquefy a gas at its critical temperature is called __________ pressure.
Fill in the blank: The process of converting a gas into a liquid by cooling and compressing is called __________.
Fill in the blank: The process of liquefying gases is important for the __________ of gases in cylinders.
Fill in the blank: The temperature above which a gas cannot be liquefied, no matter how much pressure is applied, is called the __________ temperature.
The critical temperature of carbon dioxide is 31°C. Can CO₂ be liquefied at 40°C by applying pressure?
True or False: All gases can be liquefied by applying pressure alone at room temperature.
True or False: The critical pressure is the pressure required to liquefy a gas at its critical temperature.
True or False: The critical temperature of a gas depends on the nature of the gas.
