(a). What is a universal indicator? For what purrpose is it used? (b). How does a universal
Channel: Doubtnut
Date: 2020-01-26

(a). What is a universal indicator? For what purrpose 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 a test-tube containing water?