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evaporation is a surface phenomenon where as boiling is a bulk pheonmenon
evaporation occurs at any temperature but boiling starts at constant temperature i.e., 100 degree C
evaporation is a cooling process where as boiling is constant
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boiling =  A process in which a substance changes its state from the liquid state to the gaseous state 
evaporation = A process in which a substance changes its state from the liquid state to the gaseous state without boiling
boiling           evaporation 

Fast               Slow      
Bubbles are formed    No bubbles  formed 
Occurs throughout the liquid        Takes place only from the exposed surface of the liquid   
Occurs at a definite temperature –
Boiling pointOccurs at all temperature
 Source of energy needed                  Energy supplied by surroundings
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