Cyclohexane,a hydrocarbon,floats on water because:

$A \xrightarrow{\Delta, 800^\circ C} CH_2=C=O$. Reactant '$A$' in the reaction is:

The inorganic origin of petroleum is indicated by the fact that

Give the reaction for the following transformations:
$1$. Ethanol from ethane
$2$. Benzene from $2-$hexene

The major products from the following reaction sequence are product $A$ and product $B$. The total sum of $\pi$ electrons in product $A$ and product $B$ are . . . . . . .(nearest integer)

Reactant $(A)$ can be