Aldehyde And Ketone

\(\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH} \xrightarrow[443 \mathrm{~K}]{\text { Conc. } \mathrm{H}_2 \mathrm{SO}_4} X \xrightarrow[\text { (ii) } \mathrm{Zn} / \mathrm{H}_2 \mathrm{O}\,(2 Moless)]{\text { (i) } \mathrm{O}_3} Y \xrightarrow[\text { (i) } \mathrm{H}^{+}]{\text {(i) Conc. } \mathrm{NaOH}} \mathrm{Z}\)

$Z$ is a mixture of alcohol and acid. Reaction of conversion of $Y$ to $Z$ is