posted by ann .
In melting point determination, why shouldn't a substance be re-melted? (i.e. why should we not re-melt a substance that has previously been melted in a melting point tube?)
Dat is bcos ur thermometer has cooled nd so has ur parafin oil(if it was used)so remeltin wud only give u wrong values...its advisable 2 go ova d process again n wit a diff capilary tube