Practice Zone 2
What do you understand by a chemical reaction? Explain with an example.
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2
Answer:
A chemical reaction happens when one or more chemicals are changed into one or more other chemicals. Examples: iron and oxygen combining to make rust. vinegar and baking soda combining to make sodium acetate, carbon dioxide and water. ... many reactions that happen inside living things
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A chemical reaction is what when there is a change in state,change in colour,there is gas evolution and there is temperature change.
Examples of chemical reaction:
Mg+O2------------MgO
2Fe+3H20---------Fe3O2+3H2
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