The product $\mathrm{Q}$ and $\mathrm{R}$ in the following reactions respectively are ${\mathrm{H}}_2+{\mathrm{CH}}_3\mathrm{C}\equiv \mathrm{CH}\stackrel{ \mathrm{Lindlar}\text{'}\mathrm{s} \mathrm{catalyst}}{\to }\mathrm{P}\underset{\mathrm{Zn}+{\mathrm{H}}_2\mathrm{O}}{\overset{{\mathrm{O}}_3}{\to }}\mathrm{Q}+\mathrm{R}$