Ammonia is manufactured by _____.
Ammonia is manufactured by Haber process. In this process, nitrogen and hydrogen are taken in the ratio of 1:3 by volume. Nitrogen gas is obtained by the fractional distillation of liquid air.Hydrogen gas is obtained from water gas(Bosch process) or from natural gas.
N2+3H2⇌2NH3+Heat
The reaction is reversible, exothermic and proceeds with the decrease in volume.