What is the boiling point of pure ethanol (in $K$)?

$A$ hydrocarbon,$C_{2}H_{4}$,decolorizes bromine water.
$(i)$ Name the hydrocarbon.
$(ii)$ Mention the family to which it belongs.
$(iii)$ Write the chemical equation of the reaction of this hydrocarbon with hydrogen.

Vinegar is a solution of :

Define oxidising agents. Explain its role in the oxidation of alcohols to acids. Write the oxidation reaction of ethanol.

Which condensation polymer is formed from hexamethylenediamine and adipic acid?

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