MCQ
Industrially, ammonia is obtained by direct combination between nitrogen and hydrogen. The formation of ammonia is promoted at:
  • A
    $\text{1000 atm}$
  • $\text{200 atm}$
  • C
    $\text{25 atm}$
  • D
    $\text{1 atm}$

Answer

Correct option: B.
$\text{200 atm}$
Ammonia is prepared industrially by Haber's process.
In this process, dinitrogen directly reacts with Dihydrogen in $1 : 3$ in presence of iron catalyst with promoters as oxides of potassium or aluminium. The physical conditions required for this process are $\text{200−300 atm}$ pressure and $400−450^\circ C$ temperature.

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