First slide
Lechatelier principle
Question

Statement I: Addition of inertgas has no effect on equilibrium state when carried out at constant volume. 

Statement II: Molybdenum is the catalyst used in Haber's process

Easy
Solution

(1)…..Volume is kept constant, addition of inertgas does not alter the number of moles of reactants (or) products Equilibrium state is unaffected. 

(2)….. Iron is the catalyst, Mo is the promoter.

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