In the following sequence of reaction, the final product (Z) is $\mathrm{CH}\equiv \mathrm{CH}\underset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{Hg}}^{2+}}{\to }}\mathrm{X}\underset{{\mathrm{H}}_2\mathrm{O}}{\overset{{\mathrm{CH}}_3\mathrm{MgX}}{\to }}\mathrm{Y}\stackrel{\left[\mathrm{O}\right]}{\to }\mathrm{Z}$

Sequence of Reaction: Final Product (Z)

1. Ethyne (CH≡CH) is hydrated (Hg²⁺, H₂SO₄) to form acetaldehyde (CH₃CHO).
2. Acetaldehyde reacts with methyl magnesium halide (CH₃MgX) followed by H₂O to give isopropanol (CH₃CH(OH)CH₃).
3. Oxidation of isopropanol ([O]) yields acetone (CH₃COCH₃) as the final product (Z).

Final Product (Z):