The major product of the following reaction is:

In the given reaction: $CH_3COCH_3 \xrightarrow{\text{Conc. } H_2SO_4, \text{Distillation}} [X]$. $[X]$ will be:

Glyoxal is:

Match the following reactions in List-$I$ with their corresponding products in List-$II$:
List-$I$ (Reaction):
$A$. $\text{Benzene} + Cl_2 \xrightarrow{AlCl_3}$
$B$. $\text{Benzene} + CH_3Cl \xrightarrow{\text{anhyd. } AlCl_3}$
$C$. $\text{Benzene} + R-CO-Cl \xrightarrow{\text{anhyd. } AlCl_3}$
$D$. $\text{Toluene} \xrightarrow{(i) KMnO_4/KOH, (ii) H_3O^+}$
List-$II$ (Product):
$I$. $\text{Benzoic acid}$
$II$. $\text{Alkyl phenyl ketone}$
$III$. $\text{Chlorobenzene}$
$IV$. $\text{Toluene}$

The total number of aromatic species generated in the following reactions is:

Consider the following reaction sequence:
Vinylbenzene $\xrightarrow[\Delta]{KMnO_4+KOH} X$ $\xrightarrow[\Delta]{NaOH+CaO} Y$
'$Y$' can also be formed from: