$A$ salt-producing hydrocarbon among these compounds is

In the following series of chemical reactions,identify $Z$.
$C_3H_7OH$ $\xrightarrow[160-180\,^{\circ}C]{Conc. H_2SO_4} X$ $\xrightarrow{Br_2} Y$ $\xrightarrow{Excess \ of \ Alc. KOH} Z$

Which of the following organic compounds has the same hybridization as its combustion product $(CO_2)$?

$2-$Butyne reacts with $Na$ in liquid $NH_3$ to form:

When $23 \ g$ of $Na$ reacts with $1 \ mole$ of propyne,how many moles of $H_2$ gas will be released?

Number of possible alkynes with formula $C_{5}H_{8}$ is