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GAS |
VAPOUR |
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Gas exists in gaseous state at room temperature |
Vapour exists in equilibrium with solid or liquid state at room temperature |
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It is a state of matter |
It coexists with liquid or solid at room temperature |
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The particles in gases do not have a proper arrangement when observed under the microscope |
The particles in vapour arrange in a proper shape when observed under the microscope |
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It appears at temperature greater than or equal to boiling point |
It may occur at temperature below boiling point |
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Gas can be liquified or solidified under high pressure and only under low temperatures |
Vapour can be liquified or solidified under high pressure and ordinary temperatures |
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Eg. Helium, Nitrogen |
Eg. Water vapour, Iodine vapour |
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