Question

In which of the following reactions, an increase in the volume of the container will favour the formation of products ?

• A. $2 NO _{2}( g ) \rightleftharpoons 2 NO ( g )+ O _{2}( g )$
• B. $H_2(g) + I_2(g)\rightleftharpoons2HI(g)$
• C. $4NH_3(g) + 5O_2(g) \rightleftharpoons4NO(g) + 6H_2O(l)$
• D. $3O_2(g) \rightleftharpoons 2O_3(g)$

Answer 1

Answer: (A)

$2 NO _{2}( g ) \rightleftharpoons 2 NO ( g )+ O _{2}( g )$

Answer 2

For reaction $2 NO _{2}( g ) \rightleftharpoons 2 NO ( g )+ O _{2}( g ) ; \Delta n_{ g }>0$

So, if volume increases, pressure decreases and $n$ decreases, therefore, the reaction will move in the direction where $n$ increases, that is in the forward direction which in turn will favour the formation of products.