Question

$N_2\left(g\right)+3H_2\left(g\right)\stackrel{Fe+Mo}{\rightleftharpoons }2N{H}_3\left(g\right)$; Haber's process.

Mo is used as :

• A. a catalyst
• B. a catalytic promoter
• C. an oxidising agent
• D. a catalytic poison

Answer 1

Answer: (B)

a catalytic promoter

$N{H}_3$ is manufactured by Haber's process.
$N_2\left(g\right)+3H_2\left(g\right)\stackrel{Fe+Mb}{\rightleftharpoons }2N{H}_3\left(g\right)$
In this process, pure nitrogen and hydrogen gases react in the ratio of $1:3$ by volume in ${400}^{0}C-{500}^{0}C$ temperature, $200-900$ atm pressure in presence of iron as catalyst and Mo as promoter.