Identify the major product of the following reaction:

In benzene,the $1,3$ position is known as what?

Consider the following reactions:
$C_2 H_2 \xrightarrow[500^{\circ}C]{\text{red hot iron tube}} A$
$A \xrightarrow[70^{\circ}C]{\text{conc. } HNO_3, \text{conc. } H_2 SO_4} B$
$B \xrightarrow{LiAlH_4} C_6 H_5-N=N-C_6 H_5$
$A$ and $B$ are:

By aerial oxidation,which one of the following gives phthalic acid?

In the reaction,the major product formed is:

Aromatic properties of $benzene$ are proved by