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Q.
The catalyst and promoter respectively used in the Haber's process of industrial synthesis of ammonia are
EAMCETEAMCET 2012
Solution:
In the Haber's process for the synthesis of ammonia from $N _{2}$ and $H _{2}, Fe$ is used as catalyst and $Mo$ works as activator
$N_{2} +3H_{2} \ce{<=>[Fe, Mo]} 2NH_{3} +22.4 $ kcal