Provide the bond lengths for hydrogen, ethane, ethene, and ethyne.

Structure of $A$ is

Identify the major product of the following reaction:

The major product of the reaction is:

The product of the following hydrogenation reaction is:
$C_6H_6 + H_2 \xrightarrow{\text{Catalyst, High temperature and pressure}} ?$
Given: $1 \text{ eqv. of } C_6H_6$ and $1 \text{ eqv. of } H_2$.

In laboratory burners,we use