A) \[\frac{[{{N}_{2}}]{{[{{H}_{2}}O]}^{2}}}{[N{{H}_{4}}N{{O}_{2}}]}\]
B) \[\frac{[{{N}_{2}}]{{[2{{H}_{2}}O]}^{2}}}{{{[N{{H}_{4}}N{{O}_{2}}]}^{2}}}\]
C) \[\frac{[N{{H}_{4}}N{{O}_{2}}]}{[{{N}_{2}}]{{[{{H}_{2}}O]}^{2}}}\]
D) \[[{{N}_{2}}]{{[{{H}_{2}}O]}^{2}}\]
Correct Answer: A
Solution :
The equilibrium constant for the reaction\[N{{H}_{4}}N{{O}_{2}}(s){{N}_{2}}(g)+2{{H}_{2}}O(g)\] is given by \[{{K}_{c}}=\frac{[{{N}_{2}}]{{[{{H}_{2}}O]}^{2}}}{[N{{H}_{4}}N{{O}_{2}}]}\]
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