Physics
Define the following terms.
(a) Intermolecular space
(b) Condensation
(c) Freezing point
(d) Intermolecular force of attraction
(e) Evaporation
Matter
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Answer
(a) Intermolecular space — The space between the molecules of a substance is called the intermolecular space or intermolecular distance.
(b) Condensation — The process by which a substance changes from its gaseous state to its liquid state on cooling is called condensation.
(c) Freezing point — The temperature at which a substance changes from its liquid state to its solid state on cooling is called freezing point.
(d) Intermolecular force of attraction — The force of attraction between the molecules is known as intermolecular force of attraction.
(e) Evaporation — The process in which when a liquid is heated, some molecules escape from its surface below its boiling point is called evaporation.
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Related Questions
Which of the following has the negligible intermolecular force between its molecules?
- Solid
- Liquid
- Gas
- Atom
Write one word or few words for the following.
(a) The temperature on which a solid gets changed into a liquid
(b) It is formed by combining two or more atoms
(c) It can be beaten either into sheets or into powdered form
(d) The molecules are loosely packed in this state of matter
(e) It has neither a fixed shape nor a fixed volume
Give reasons for the following statements.
(a) Solids are rigid and incompressible.
(b) Change in temperature cause changes in state of matter.
(c) Liquids take the shape of the container.
(d) Ice changes to water and water changes to steam.
(e) Water droplets form on a glass of cold water.
How does a liquid get converted into a gas?