Hydration of propyne results in the formation of.......

The major product $(A)$ is:

$2$-Hexyne reacts with $.......$ to give $trans-2$-hexene.

Provide the primary information about alkynes.

Which alkyne yields butanoic acid $(CH_3CH_2CH_2CO_2H)$ as the only organic product on treatment with ozone followed by the hydrolysis?

What is the product formed by the hydration of propyne in the presence of $H_2SO_4$ and $HgSO_4$?