Draw $3\mathrm{D}$ formulae for propane.

Write the name of the isomers shown below:

Draw the displayed formulae and name the functional group isomers of ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$ that is:

• an aldehyde

Draw the displayed formulae and name the functional group isomers of ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$ that is:

• a ketone

Draw the displayed formula and name an isomer of ${\mathrm{C}}_3{\mathrm{H}}_8\mathrm{O}$ that could be used as an example of the positional isomerism of one of the isomers in the given figures.