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Exothermic reactions are the reactions where heat is evolved. 
eg., CaO+H2O=Ca(OH)2+heat
endothermic reactions are the reactions in which heat is absorbed.
eg., photosynthesis

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it is not helpful i asked for the activity with proper sequence
thank me and mark it as best i will give you the answer.
those who beg i never give them the points
In exothermic reaction, heat is involved..... 
in endothermic reaction heat is absorbed....
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