The product formed in the above reaction is

The number of possible alkynes with the molecular formula $C_5H_8$ is

Acetylenyl hydrocarbons are acidic because ..

$A \xrightarrow{Ag_2O} \text{ppt}$
$A$ $\xrightarrow{Hg^{2+} / H^{+}} B$ $\xrightarrow{NaBH_4} C$ $\xrightarrow{conc. HCl / ZnCl_2} \text{Turbidity within 5 minutes}$.
Consider the following reactions,'$A$' is:

When $1,2-$dibromopropane is treated with $X$ moles of $NaNH_2$,the resulting compound reacts with ethyl bromide to form pentyne. What is the value of $X$?

The reagent for the reaction $R-CH_2-CCl_2-R \xrightarrow{\text{reagent}} R-C \equiv C-R$ is: