Pure chlorine gas may react vigorously with ammonia gas. An excessive mix of the two gases in air can produce hazardous compounds such as nitrogen trichloride.The following reaction takes place:\\\\(N{ H }_{ 3 }+3{ Cl }_{ 2 }\\longrightarrow N{ Cl }_{ 3 }+3HCl\\\\)Ammonia reacts with excess of chlorine to form \\\\( N{ Cl }_{ 3 } \\\\) and \\\\( HCl \\\\).