When a sample of `NO_(2)` is placed in a container, the equilibrium is rapidly established. If the equilibrium mixture is of a darker colour at high temperalures and at low pressures, which of the following statements about the reaction is true ? ` 2NO_(2) (g ) - Q hArr N_(2) O_(4)` (g)

Options

A. Formation of `N_2O_4` from `NO_2` is exothermic and `N_2O_4` is darker in colour than `NO_2`
B. Formation of `N_2O_4` from `NO_2` is exothermic and `NO_2` is darker in colour than `N_2O_4`
C. Rate of transformation of `NO_2` to `N_2O_4` is equal to the rate of transformation of `N_2O_4` to `NO_9`, at equilibrium
D. There is no change in the concentrations, colour, vapour density of reaction mixture, at equilibrium

Answer

B, C, D

Explanation

Low pressure favours backward reaction `implies NO_(2)` is derker colour high temperature favours backward reaction exothermic reaction