Question

the purpose of the mixed melting point test is to: purify the sample raise the melting point identify an unknown by comparison with a known compound determine the solubility of the sample

Explanation:

A mixed - melting point test compares an unknown with a known compound. If the mixture has a sharp melting point close to the known compound's, they are likely the same.

Answer:

C. Identify an unknown by comparison with a known compound