What is a universal indicator? For what purpose is it used? (b) How does a universal indicator work? (c) Water is a neutral substance. What colour will you get when you add a few drops of universal indicator to test-tube containing water?
ChemistryClass 10ICSEAnswered 27 Mar 2026
Answer
- Universal indicator is a mixture of different indicators which gives colours at different pH and it exactly shows how much the solution is acidic or basic. The scale is from 0 to 14.
- Universal indicator is a pH indicator and it shows colour change if we add a drop of acid or It exhibits several colour changes according to the nature of solution.
- For neutral substance like water The pH value will be always A green colour will be observed when a drop of universal indicator added to the testube contacting water and shows the neutrality of water.