Answer:
Iodoform test
Step-by-step explanation:
Methyl ketones give a positive iodoform test. Acetophenone is a methyl ketone, whereas benzophenone is a phenyl ketone. Therefore, acetophenone gives a positive iodoform test by giving a yellow precipitate of iodoform with an alkaline solution of iodine. Whereas, benzophenone gives a negative test.