Physical and Chemical Changes
A change is transformation of a substance from one form to another. It may alter the physical or chemical or both the properties of the substance. Changes can be classified as desirable or undesirable, natural or man-made, periodic or non-periodic, reversible or irreversible, slo.... Read More
Change of matter from one form to another involves energy changes. It can be done by boiling, evaporation, condensation, freezing, melting, sublimation and deposition.
Boiling point is the constant temperature at which liquid changes to vapour and the phenomenon is know.... Read More