In an extraction experiment, a unknown neutral compoundwas extracted and its melting point was measured to be 75.0C -76.1C.The possible identity of the unknown arefluorenone (mp 82-85C)fluorene (mp 116-117C)1,2,4,5-tetrachlorobenzene (mp 139-142C) triphenylmethanol (mp 162-164C)
Did something go wrong in the experiment? If the extracted unknown is impure, why does it's melting point have a narrow range?