In the recrytallization / melting point lab, there are a number of experimental details that need to be followed. Choose whether the following statements are true or false.

a. If a mercury or alcohol thermometer is used in a melting point determination, it should be read to the nearest whole degree, a fractional degree reading is not possible.
b. A slow heating rate is necessary near the expected melting point A too bulky sample will cause an artificially long melting point range.
c. In some melting point instruments, the sample is placed on a microscope slide which is then placed on top of a heated metal block, and the temperature of the metal block is raised until melting is observed.
d. If the sample to be melted were placed on a microscope slide then heated, finger oils on the microscope slide will lower the melting point.