Silver acetylide when heated with $HCl$ gives:

Acetylene reacts with $HCN$ in the presence of $Ba(CN)_2$ to yield

Write the following reactions:
$(1)$ Ethyne $+$ $(Cl_2 \text{ or } Br_2)$
$(2)$ Hydration reaction of but$-1-$yne.

Which of the following is a homologue of ethyne?

$CaC_2$ reacts with $H_2O$ to produce ...... .

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