A solution of rubbing alcohol that is 30% isopropanol and 70% water is isopropanol is the solvent. Therefore, option A is correct.
A solute may be dissolved by a solvent, which creates a solution. In addition to being a liquid, a supercritical fluid, a solid, or a gas can also be a solvent.
We can say that isopropyl alcohol is the solvent in a mixture of water and isopropyl alcohol that is 70-30 because it has a larger volume.
Microorganisms are destroyed by a 70% isopropyl alcohol solution by causing the cell wall's plasma membrane to dissolve. The thin layer of peptidoglycan that makes up the gram-negative bacteria's plasma membrane is easily broken down by alcohol. Since it contains 70% isopropyl alcohol, it is referred to as pharmaceutical alcohol.
Thus, option A is correct.
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