1.

What is meant by combination reaction ? Explain it with a suitable example.

Answer»

Solution :CHEMICAL REACTION in which two or more SUBSTANCES (reactants) undergo reaction to form a single product is called combination reaction.
For example
`underset("(Lime stone, quick lime)")(underset("Calcium oxide")(CaO(s)))+underset("water")(H_(2)O(I)) to underset("(Slaked lime, lime water)")(underset("Calcium hydroxide")(Ca(OH)_(2)(aq)))`
In above reaction, two compounds CaO(s) and `H_(2)O(l)` undergo chemical reaction and form single product `Ca(OH)_(2)(aq)`, ALONG with evolution of HEAT. Thus, this reaction is a combination reaction.


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