When acetylene is passed through dilute $H_2SO_4$ in the presence of $HgSO_4$,the compound formed is .....

The products of the following reaction $CH_3-C\equiv C-CH_2-CH_3 \xrightarrow[2. \text{Hydrolysis}]{1. O_3} ...$ are

Provide the chemical reactions for the following conversions:
$(1)$ Propyne from ethyne
$(2)$ $2-$butyne and $1-$butyne from ethyne

Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of $HgSO_4$ and $H_2SO_4$?

What is formed when acetylene reacts with hypochlorous acid?

Which is the most suitable reagent among the following to distinguish compound $(iii)$ from the rest of the compounds?
$(i)$ $CH_3-C\equiv C-CH_3$
$(ii)$ $CH_3-CH_2-CH_2-CH_3$
$(iii)$ $CH_3-CH_2-C\equiv CH$
$(iv)$ $CH_3-CH=CH_2$