What is the set time for mixed acrylic before it is placed into the mouth?

The correct time for mixed acrylic before it is placed into the mouth is typically between 1 to 2 minutes. This timeframe allows the acrylic to reach an acceptable degree of viscosity, making it easy to manipulate and apply without being overly runny or too hard.

During this period, the dental assistant or practitioner can ensure that the material is adequately mixed and begins to set to a workable state. If the material is placed in the mouth too soon, before it has had adequate time to transition through its setting stages, it may lead to improper adhesion or an uncomfortable experience for the patient due to excess flow or inadequate containment of the material.

The other options suggest either too short or too long a setting time, which would not achieve the balance of workability and firming needed for proper application.