Answer :
If more ammonia is added to the reaction at equilibrium, the equilibrium will shift to the right.
Le Cha-teliar's principle
The principle states that reactions at equilibrium will always adjust to neutralize any effect due to constraints.
Thus, ammonia being a reactant in the reaction will make the equilibrium shift to the right because the reaction will adjust to annul the effects of increasing the concentration of ammonia in the reaction.
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