Which one of the following classes of compounds is obtained by the cyclic polymerization of acetylene?

To synthesize the unsymmetrical alkyne $CH_3-C\equiv C-CH_2-CH_3$,the reagents needed would be:

Which of these will not react with acetylene?

The reagent used for converting acetylene to oxalic acid is

Identify the alkyne in the following sequence of reactions:
Alkyne $\xrightarrow{\text{H}_2, \text{Lindlar's catalyst}} A$ $\xrightarrow{\text{Ozonolysis}} B \text{ (only)}$
Given that $B$ is obtained from $\text{CH}_2=\text{CH}_2$ via the Wacker process.

The reaction of calcium carbide with water produces.......