The suffix $-ol$ is attached to which functional group in nomenclature?

Ethanol reacts with sodium and forms two products. These are:

Identify the compounds $A$ to $E$ in the following reaction sequence:
$(i)$ $CH_3CH_2OH \xrightarrow[dil. HCl]{KMnO_4/KOH} (A) + H_2O$
$(ii)$ $CH_3CH_2OH + A \xrightarrow[\Delta]{Conc. H_2SO_4} B + H_2O$
$(iii)$ $B + NaOH \rightarrow C + CH_3CH_2OH$
$(iv)$ $A + NaHCO_3 \rightarrow C + D + H_2O$
$(v)$ $CH_3CH_2OH + E \rightarrow CH_3CH_2ONa + H_2$

Which substance is produced by the reduction of methanal in the presence of a palladium catalyst?

Chlorine reacts with saturated hydrocarbons at room temperature in the:

Write the molecular formula of benzene and state the number of double bonds in its structure.