Akpofure

The compound is most likely to be A.This is because Sample A containing little impurities will cause a reduction in its melting point not an increase as it would apply for Sample B.

The unknown compound could be aspirin,this can only happen if the aspirin contains a little impurity and the heating rate is moderate,then its possible for aspirin to melt at a temperature a little less than 135 degree celcius. Also,the unknown compound c...