Question

what are homogeneous molecules and heterogeneous molecules

Answer 1

the molecules which completely dissolve in water is called homogeneous molecules. the molecules which does not dissolve completely in water is called heterogeneous molecules

Answer 2

Homogeneous molecules are those molecules which are only made up of same kind of molecules. (homo means same)  therefore heteromolecules are those molecules     which are made up of different types of molecules. (hetro-different)