question_answer

For the chemical reaction\[{{\operatorname{N}}_{2}}{{O}_{4}}(g)\,\,=\,\,-\,2N{{O}_{2}}(g)\] The observed molecular weight of \[{{\operatorname{N}}_{2}}{{O}_{4}}\] is \[60 g mo{{l}^{-}}^{1}\] at 300 K. The percentage dissociation of \[{{\operatorname{N}}_{2}}{{O}_{4}}\] (g) at 300 K is

A)  \[10\,%\]                      

B)  \[15\,%\]

C)  \[20\,%\]                      

D)  \[53\,%\]