For which of the following equilibria does decrease in pressure not favour the forward reaction ?

Options

A. `N_(2(g))+3H_(2(g)) Leftrightarrow 2NH_(3(g)), triangleH=-Q_(1)`
B. `CaCO_(3(s)) Leftrightarrow CaO_((s))+CO_(2(g)), triangleH=+Q_(2)`
C. `3O_(2(g)) Leftrightarrow 2O_(3(g)), triangleH=+Q_(3)`
D. `N_(2(g))+O_(2(g)) Leftrightarrow 2NO_((g)), triangleH=+Q_(4)`

Answer

C

Explanation

High temperature - endothermic
High pressure - less moles