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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 isA. NagativeB. PositiveC. ZeroD. Not defined |
Answer» Correct Answer - A The reaction Is endothermic in nature because on decreasing temperature the reaction becomes slow. |
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