Addition of hydrogen, halogens, water and hydrogen halides to alkynesMedium

Multi Step Synthesis Molar Mass Calculation

$\xrightarrow[\; \underset{\substack{(iv)\,\mathrm{H}_2,\mathrm{Na}/\mathrm{NH}_3\,(l)\\ (iii)\,\mathrm{CH}_3\mathrm{I}}}{(ii)\,\mathrm{NaNH}_2\,\text{excess}}]{(i)\,\mathrm{Br}_2/\mathrm{CHCl}_3}$
Compound (X) is subjected to the sequence of reactions as shown above. Molar mass of the major product (Y) formed is _____ $\mathrm{g}\ \mathrm{mol}^{-1}$ .
(Given molar mass in $\mathrm{g}\ \mathrm{mol}^{-1}\ \mathrm{C}: 12,\ \mathrm{H}: 1,\ \mathrm{O}: 16$ )

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