c
આદર્શ વાયુ અવસ્થા સમીકરણ \(PV\, = \,\frac{M}{{{M_0}}}RT\) પરથી \(PV \propto \frac{1}{{{M_0}}}\) કારણ કે અહી \(M\) અને \(T\) અચળ આપેલ છે .

\(\therefore \,\,\,\frac{{{P_1}{V_1}}}{{{P_2}{V_2}}}\, = \,\frac{1}{{{{({M_0})}_1}}} \times {({M_0})_2}\,\,\,\,\)

\(\therefore \frac{{{P_1}}}{{{P_2}}}\, = \,\frac{{{{({M_0})}_2}}}{{{{({M_0})}_1}}} \times \frac{{{V_2}}}{{{V_1}}}\,\,\,\,\,\,\,\,\,(\because \,\,\,{({M_0})_2} = \,\,32\,,\,\,{({M_0})_1} = \,\,28\) અને \({V_2} = \,2{V_1})\)

\( = \frac{{32}}{{28}} \times \frac{{2{V_1}}}{{{V_1}}}\,\, = \,\,\frac{{64}}{{28}}\,\, = \,\frac{{16}}{7}\)