The pH of a liquid was found to be 7. Which liquid is it likely to be?

Water

The correct answer is option 3. water.

A pH of 7 indicates a neutral solution. Therefore, the likely liquid is water.

Pure water has a pH of 7, making it neutral. In a neutral solution, the concentration of hydrogen ions (\(H^+\)) equals the concentration of hydroxide ions (\(OH^-\)), resulting in a balanced pH value of 7. Therefore, when a liquid has a pH of 7, it is likely to be water.