PLEASE EXPLAIN 61 TH QUES
 

Dear Student,

Enthlapy is positive in both the cases, i.e. the reaction is endothermic. Since, energy is required for the formation of these compounds, so higher the energy required for its formation, less will be its stability. The compound with less enthalpy of formation will be more stable it needs less energy for its formation.
Now, N2O4 has less enthalpy of formation than NO2 therefore, N2O4 will be more stable than NO2.

Hence, the correct answer is (B)

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(B) option is correct.
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