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NEET levelSingle correct optionDifficulty 1 of 3pn019

In the Haber process for the manufacture of ammonia, the catalyst used is

Airon oxide with small amounts of $K X_{2} O$ and $Al X_{2} O X_{3}$
Bplatinum-rhodium gauze
Cvanadium pentoxide
Dfinely divided nickel

Answer: A

Haber's process uses

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

at about 200 atm and 700 K over iron oxide promoted with

K X_{2} O

and

Al X_{2} O X_{3}

. Pt-Rh gauze is used in the Ostwald process and

V X_{2} O X_{5}

in the contact process.

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