How can you show that chemical reaction has taken place?
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By the evolution of a gas.....
Ex:-Na+H2O---->Na(OH)+H2
Hydrogen gas is evolve in this reaction....
Ex:-Na+H2O---->Na(OH)+H2
Hydrogen gas is evolve in this reaction....
Answered by
0
when a chemical reaction takes place then a new sub is formed and with it their is a release or gain of heat energy.
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