Question

what is chemical reaction and plz give me two examples

Answer 1

A reaction which is reversible is known as an chemial reation.
ex:H2+O=H2O
milk turns to curd
burning of magnesium ribbon

Answer 2

Chemical reaction=Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products. Ex=One example of a synthesis reaction is the combination of iron and sulfur to form iron(II) sulfide: Another example is simple hydrogen gas combined with simple oxygen gas to produce a more complex substance, such as water.