Why does a sharp glass edge become smooth on heating it up to its melting point in a flame? Explain which property of liquids is responsible for this phenomenon.
(N/A) Sharp glass edges are heated to make them smooth. On heating,glass melts and the surface of the liquid tends to take a rounded shape at the edges to minimize its surface area. This process is known as fire polishing of glass. This phenomenon is due to the property of surface tension.
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