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A mixture of several indicators showing different colours at different acidities is the:
AUniversal solution
BUniversal substance
CUniversal precipitate
DUniversal indicator
Answer & Solution
Correct answer: D. Universal indicator
1. A single dye gives only one colour change.
2. A blend of dyes gives a range of colours.
3. That blend is the universal indicator.
_Source: syllabus Science Class X, Chapter 2, Acids, Bases and Salts._
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