What is the chemical test for identification of benzophenone?
After identification of ketone, to identify benzophenone you need to find the range of melting point using melting point apparatus which you should get in range of $48.3\ \mathrm{^\circ C}$ to $50.6\ \mathrm{^\circ C}$.

Then you can find IR of unknown(benzophenone).

Source: Prezi