Laws of Chemical Combinations
CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

306688 One of the following combination which illustrates the law of reciprocal proportions?

1 \({{\rm{N}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{,}}{{\rm{N}}_{\rm{2}}}{{\rm{O}}_{\rm{4}}}{\rm{,}}{{\rm{N}}_{\rm{2}}}{{\rm{O}}_{\rm{5}}}\)
2 \({\rm{NaCl,}}\,\,{\rm{NaBr,}}\,\,{\rm{NaI}}\)
3 \({\rm{C}}{{\rm{S}}_{\rm{2}}}{\rm{,C}}{{\rm{O}}_{\rm{2}}}{\rm{,S}}{{\rm{O}}_{\rm{2}}}\)
4 \({\rm{P}}{{\rm{H}}_{\rm{3}}}{\rm{,}}{{\rm{P}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}{\rm{,}}{{\rm{P}}_{\rm{2}}}{{\rm{O}}_{\rm{5}}}\)