Mention four characteristics which change with increasing molecular mass in a homologous series.

(N/A) In a homologous series,as the molecular mass increases,the following characteristics change:
$(a)$ Melting and boiling points increase gradually due to the increase in intermolecular forces.
$(b)$ Physical properties such as density and solubility in a particular solvent show a regular gradation.
$(c)$ Molecular mass increases,which leads to a change in the physical state (e.g.,from gas to liquid to solid).
$(d)$ The chemical properties remain similar,but the intensity of reactions may vary slightly due to the change in the carbon chain length.