define water vapour???
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water vapous or aqueos vapour is the geasous phase of water usually present in atmosphere.water vapour can be produced by evaporationnof boiling water and sublimation of ice.
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Water vapour is the gaseous state of water formed due to processes such as boiling and evaporation. It occurs only on absorption of heat or blowing of a firm wind and this gas is also a greenhouse gas.
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