A good adhesive should possess all of the following EXCEPT:
**Core Concept**
A good adhesive is a substance that forms a strong bond between two surfaces, typically through chemical interactions. This bond must be durable, resistant to failure, and capable of withstanding various environmental conditions.
**Why the Correct Answer is Right**
The correct answer is related to the properties of a good adhesive. A good adhesive should possess **cohesion**, **adhesion**, and **viscoelasticity**. Cohesion refers to the internal forces that hold the adhesive together, while adhesion refers to the forces that allow the adhesive to bond with the surface. Viscoelasticity, on the other hand, is the ability of the adhesive to deform under stress and then return to its original shape. This property is crucial for the adhesive to maintain its bond over time.
**Why Each Wrong Option is Incorrect**
**Option A:** The statement is incomplete and doesn't form a cohesive idea about a property of a good adhesive.
**Option B:** This could be a potential property of a good adhesive, such as surface tension, but it's not the most critical one for an adhesive.
**Option C:** This is actually a desirable property of a good adhesive, which helps in spreading and wetting the surface evenly.
**Clinical Pearl / High-Yield Fact**
When evaluating the properties of an adhesive, remember the acronym **C-A-V** (Cohesion-Adhesion-Viscoelasticity) to ensure you're considering the most critical factors.
**Correct Answer:** A.