A) \[{{K}_{c}}=\frac{[{{P}_{4}}{{O}_{10}}]}{[{{P}_{4}}]{{[{{O}_{2}}]}^{5}}}\]
B) \[{{K}_{c}}=\frac{[{{P}_{4}}{{O}_{10}}]}{5[{{P}_{4}}][{{O}_{2}}]}\]
C) \[{{K}_{c}}={{[{{O}_{2}}]}^{5}}\]
D) \[{{K}_{c}}=\frac{1}{{{[{{O}_{2}}]}^{5}}}\]
Correct Answer: D
Solution :
In the expression for equilibrium constant \[({{K}_{p}}\] or \[{{K}_{c}})\] species in solid state are not written \[(ie,\] their molar concentrations are taken as \[1)\] \[{{P}_{4}}(s)+5{{O}_{2}}(g){{P}_{4}}{{O}_{10}}(s)\] Thus, \[{{K}_{c}}=\frac{1}{{{[{{O}_{2}}]}^{5}}}\]
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