Final answer:
Silver nitrate can indeed be used as a topical germicide on mouth ulcers, confirmed by its historical and ongoing use in medical treatments and its ability to enhance the effectiveness of antibiotics.
Step-by-step explanation:
The statement that silver nitrate can be used as a topical germicide on mouth ulcers is True. Silver has long been known for its antiseptic properties and has been used in various forms to prevent and treat infections. For example, Silver nitrate was traditionally used to prevent ocular infections in newborns and Silvadene cream is used for treating topical wounds and burn injuries to prevent infection. Additionally, when combined with antibiotics, silver can make these drugs significantly more effective at combating microbes. Therefore, silver nitrate can indeed be applied to mouth ulcers to serve as a germicide. However, it is important to use such treatments under proper medical supervision to ensure safety and effectiveness.