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Ophthalmic Assistant

Category - Pharmacology

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What does tonicity refer to?

The concentration of a chemical in a solution
The color of a solution
The viscosity of a solution
The pH of a solution

Explanation

Answer: A - The concentration of a chemical in a solution

Tonicity refers to the concentration of a chemical in a solution. Normal saline solution (0.9% sodium chloride) has a tonicity similar to that of tears and therefore is tolerated well by the eyes.

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