Explanation:
We know that,
Molecular weight of compound or molecules \({\rm{ = 2 \times V}}{\rm{.D}}\).
Vapour density (V. D.) of ozone molecules\({\rm{ = }}\frac{{{\rm{M}}{\rm{.wt}}{\rm{. of }}{{\rm{O}}_{\rm{3}}}}}{{\rm{2}}}{\rm{ = }}\frac{{{\rm{48}}}}{{\rm{2}}}{\rm{ = 24}}{\rm{.}}\)
\({\rm{Hence,V}}{\rm{.D}}{\rm{.}}\,\,{\rm{of}}\,\,{{\rm{O}}_{\rm{3}}}\,\,{\rm{is}}\,{\rm{24}}{\rm{.}}\)