Question

In a flask, colourless `N_(2)O_(4)` is in equilibrium with brown-coloured `NO_(2)`. At equilibrium, when the flask is heated to `100^(@)C` the brown colour deepens and on cooling, the brown colour became less coloured. The change in enthalpy `DeltaH` for the ayatem is
A. Nagative
B. Positive
C. Zero
D. Not defined

Answer 1

Correct Answer - A
The reaction Is endothermic in nature because on decreasing temperature the reaction becomes slow.