What is the solution of ethanol containing $5\%$ water called?

With the help of a diagram,explain the cleansing action of soap.

The molecular formula of $A$ is $C_{10}H_{18}$ and $B$ is $C_{18}H_{36}$. Name the homologous series to which they belong.

$(i)$ What is vinegar? State its one use.
$(ii)$ Which gas is produced when dilute ethanoic acid is added to sodium bicarbonate? How will you test the presence of this gas?

Identify the unsaturated compounds from the following:
$(i)$ Propane
$(ii)$ Propene
$(iii)$ Propyne
$(iv)$ Chloropropane

What is the molecular formula of ethyl acetate?