Question 12 of 194

In a flask, colourless N2O4(g) is in equilibrium with brown coloured NO2(g). At equilibrium when the flask is heated to 100°C, the brown colour deepens and on cooling it becomes coloured. Which statement is incorrect about this observation?

(a) The H for the reaction N2O4(g) 2NO2(g) is +ve

(b) Paramagnetism increases on cooling

(c) The H-U at 100°C is equal to 200 cal

(d) Dimerisation is reduced on heating