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NEET levelSingle correct optionDifficulty 1 of 3df007

In the industrial Haber process for ammonia, the usual catalyst is

A $V X_{2} O X_{5}$
Banhydrous $AlCl X_{3}$
Cplatinum-rhodium gauze
Dfinely divided iron with molybdenum as a promoter

Answer: D

The Haber synthesis

N X_{2} + 3 H X_{2} 2 NH X_{3}

is carried out over finely divided Fe with Mo as promoter at about 700 K.

V X_{2} O X_{5}

is for the contact process and Pt-Rh gauze is for ammonia oxidation.

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