In which reaction at equilibrium will the amount kof reactants present increase with an increase in the container volume?

In which reaction at equilibrium will the amount kof reactants present

1.	In which reaction at equilibrium will the amount kof reactants present increase with an increase in the container volume?
Answer» `C(s)+CO_(2)(g) hArr 2CO(g)` `H_(2)(g)+F_(2)(g) hArr 2HF(g)` `CO(g)+NO_(2)(g) hArr CO_(2)(g)+NO(g)` `N_(2)(g)+3H_(2)(g) hArr 2NH_(3)(g)` ANSWER :D