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

The nature of the solution can be:
  1. Bases change the colour of litmus paper to blue. As the colour of blue litmus paper is not affected, the solution must be basic.
  2. If the solution is neutral, even the colour of the litmus will not change.
[Extra information: 
Litmus is a natural indicator. A natural Indicator is a type of indicator that can be found naturally and can help us to know whether the material tested is an acidic substance or a basic substance. It is obtained from lichens. The process of obtaining a litmus solution needs the crushing and grinding of lichens.
Some examples of natural indicators other than litmus are:  red cabbage, turmeric, turnip skin, curry powder, etc.
It is used to test materials for acidity and basicity. This solution can also be used to differentiate between acids and bases. When acid is added to a litmus solution, it changes to red. When a base is added, it changes to blue. Neutral litmus paper is purple in colour.


Simply Easy Learning

Updated on: 10-Oct-2022


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