The gas phase reaction 2NO₂(g) $$ \to $$ N₂O₄(g) is an exothermic reaction. The decomposition of N₂O₄, in equilibrium mixture of NO₂(g) and N₂O₄(g), can be increased by :

For which of the following processes, $$\Delta $$S is negative ?

If 50% of a reaction occurs in 100 second and 75% of the reaction occurs in 200 secod, the order of this reaction is :

The most polar compound among the following is :