What is Z in the given sequence of reactions?
\[
\text{Propyne}
\xrightarrow{H_2/Pd-C,\ Quinoline}
X
\xrightarrow{H_2O/H^+,443K}
Z
\]
Show Hint
Terminal alkynes on hydration generally produce carbonyl compounds.
Remember:
\[
\text{Alkyne}
\rightarrow
\text{Enol}
\rightarrow
\text{Carbonyl compound}
\]
through keto-enol tautomerism.