Which of the following indicates a basic solution?

A basic solution is characterized by a pH greater than 7. The pH scale ranges from 0 to 14, with values below 7 indicating acidic solutions, a pH of 7 considered neutral, and values above 7 indicating basic or alkaline solutions.

A pH of 10 is well above 7, clearly showing that it is in the basic range. Substances with a pH of 10 can often include cleaning agents or other alkaline compounds. In contrast, a pH of 4, 6, or 3 falls below the neutral point of 7, indicating that those solutions are acidic rather than basic. This understanding of the pH scale and its implications on acidity and basicity is fundamental in water treatment practices and various chemical applications.