Question

What is reactant and product?

Answer 1

reactant are the compounds or elements which are present in the left side side of the chemical reaction . they react with other elements or compounds
products are the compound formed by the reactants
for example. 2H2+ O2 are the reactants which give water (2H2O) product

Answer 2

Hi  friend,

The reactants are the one which are formed on the left side of a reaction.The products are formed on the right side of the chemical reaction.
EX;- 2Mg+ O2-> 2Mgo.
 Mg=reactants           Mgo= product.

hope this helps.....