How does pressure help in the liquefaction of gases? Explain.
(N/A) When pressure is applied to a gas,the particles are forced closer together. As the distance between the particles decreases,the intermolecular forces of attraction become strong enough to hold the particles together. During this process,the particles lose kinetic energy in the form of heat,leading to a change in state from gaseous to liquid. This process is known as the liquefaction of gases. By using this method,a large volume of gas can be compressed into a small cylinder for storage and transport.
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Give reasons for the following:
$(a)$ Water droplets appear on the outer surface of a tumbler containing ice-cold water.
$(b)$ People prefer to wear cotton clothes in summer.
$(c)$ On a hot sunny day,people sprinkle water on the roof or open ground.
$(a)$ Water droplets appear on the outer surface of a tumbler containing ice-cold water.
$(b)$ People prefer to wear cotton clothes in summer.
$(c)$ On a hot sunny day,people sprinkle water on the roof or open ground.
Difficult
View Solution$CO_{2}$ is a gas. Write any two of its gaseous properties to justify this. How can we liquefy this gas? Solid $CO_{2}$ is also known as dry ice. Why?
Medium
View SolutionClassify the following processes into osmosis or diffusion:
$(a)$ Swelling up of a raisin on keeping in water.
$(b)$ Spreading of virus on sneezing.
$(c)$ Earthworm dying on coming in contact with common salt.
$(d)$ Shrinking of grapes kept in thick sugar syrup.
$(e)$ Preserving pickles in salt.
$(f)$ Spreading of smell of cake being baked throughout the house.
$(g)$ Aquatic animals using oxygen dissolved in water during respiration.
$(a)$ Swelling up of a raisin on keeping in water.
$(b)$ Spreading of virus on sneezing.
$(c)$ Earthworm dying on coming in contact with common salt.
$(d)$ Shrinking of grapes kept in thick sugar syrup.
$(e)$ Preserving pickles in salt.
$(f)$ Spreading of smell of cake being baked throughout the house.
$(g)$ Aquatic animals using oxygen dissolved in water during respiration.
Medium
View Solution$(a)$ Define matter and write its three states.
$(b)$ Explain how these states of matter arise due to variation in the characteristics of the particles.
$(b)$ Explain how these states of matter arise due to variation in the characteristics of the particles.
Difficult
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$(ii)$ Give one use of each.
$(ii)$ Give one use of each.
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