Q. 2 C4.2( 52 Votes )
Reactants – The substances which take part in a chemical reaction are called reactants.
Products – The substances which are formed due to the formation of new bonds in a chemical reaction are called products.
Here, H2 and O2 take part in the chemical reaction, hence they are reactants. H2O is formed by the formation of new bonds; hence it is a product.
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