Q. 274.3( 25 Votes )
(a) Define a combina
(a)Reaction in which two or more substances combine to form a single substance are called combination reaction.
(b) C (s) + O2 (g) CO2 + Heat
Reaction is exothermic as heat is given from the reaction.
(c) N2 (g) + O2 (g) + Heat 2NO (g)
Reaction is endothermic as heat is given to the reaction.
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