JEE Main Chemistry question

Not in JEE Main or NEET syllabus

The catalyst iron, employed in Haber's process, contains molybdenum. The function of molybdenum is:

(A)To increase the rate of combination of gases
(B)To counterbalance for the presence of impurities in the gases
(C)To act as a catalyst promoter and increase the activity of the catalystCorrect
(D)To make up for the adverse temperature and pressure conditions

Answer: (C)

Solution

Molybdenum itself has little catalytic activity for ammonia synthesis, but when added in small amount to the iron

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Question ID VK-144995