Answer : The products formed on the decomposition of ammonia are, hydrogen gas
and nitrogen gas
.
Explanation :
Decomposition reaction : It is defined as the chemical reaction in which the larger molecules decomposes to give two or more smaller molecules.
When the ammonia
decomposes then it gives hydrogen gas and nitrogen gas as a product.
The balanced chemical reaction will be,

In this reaction,
is the reactant and
and
are the products.
By the stoichiometry we can say that 2 moles of ammonia decomposes to give 3 moles of hydrogen gas and 1 mole of nitrogen gas as a product.
Therefore, the products formed on the decomposition of ammonia are, hydrogen gas
and nitrogen gas
.