Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution ? Explain.

Answer

To determine the nature of the solution in which blue litmus paper remains blue, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Litmus Paper**: Litmus paper is a natural indicator used to test the pH of a solution. It can change color depending on the acidity or basicity of the solution.

2. **Identify the Color Change**:
- Blue litmus paper turns red when it comes in contact with an acidic solution.
- Blue litmus paper remains blue when it is in a neutral or basic solution.

3. **Analyze the Given Situation**: In this case, the blue litmus paper is dipped in a solution and it remains blue.

4. **Conclusion on the Nature of the Solution**: Since the blue litmus paper does not change color, we can conclude that the solution is either neutral (pH 7) or basic (pH greater than 7). However, since the question specifically asks about the nature of the solution, we can say that it is a basic solution.

5. **Final Explanation**: The solution is basic because it does not cause any change in the color of the blue litmus paper. Therefore, we can conclude that the solution is not acidic.