Q.
If a mixture containing 3 moles of hydrogen and 1 mole of nitrogen is converted completely into ammonia, the ratio of volumes of reactants and products at the same temperature and pressure would be
N2(g)+3H2(g)⇌2NH3(g)
As 4 moles of reactants form of 2 moles of product, so ratio of volumes of reactants and products at the same temperature and pressure would be 2:1 or 4:2.