PSI Texas State Board Nail Tech practice exam

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What causes chemical attraction when primer is applied to the nail plate?

Polarity
Adhesion
Friction
Evaporation

The correct answer is: Adhesion

The correct choice highlights the role of adhesion in creating chemical attraction when primer is applied to the nail plate. Adhesion refers to the bond that develops between different substances, in this case, between the primer and the natural nail. When a primer, which is typically formulated with specific chemicals, is applied to the nail surface, it creates a chemical bond that enhances the adherence of products like nail enhancements or polish to the nail plate. This bond is crucial for ensuring that the application is durable and resistant to lifting or chipping. Other options might play roles in different contexts but are not the primary factors at play here. For instance, polarity relates to the distribution of electric charge within a molecule and could influence chemical interactions to some extent, yet it's not the direct cause of the bonding phenomenon described in terms of primer application. Friction pertains to the physical resistance encountered between surfaces, which can affect how products interact when applied but does not involve the chemical bonding that is central to adhesion. Evaporation suggests the process of a substance transitioning from liquid to vapor, which does not directly relate to the bonding process between primer and the nail plate in this context.