What are the physical properties of alkanes?

(N/A) $(i)$ Alkanes are colourless and odourless.
$(ii)$ Alkanes are insoluble in water but soluble in non-polar organic solvents.
$(iii)$ The boiling points of alkanes increase with an increase in molecular weight due to the increase in van der Waals forces.
$(iv)$ For isomeric alkanes,the boiling point decreases with branching because the surface area decreases,leading to weaker intermolecular forces.
$(v)$ Melting points do not show a regular trend; however,alkanes with an even number of carbon atoms generally have higher melting points than those with an odd number of carbon atoms due to better packing in the crystal lattice.