Question
From which source is the purple dye known as litmus
solution extracted?Solution
Litmus solution, used as a pH indicator, is derived from lichen—a symbiotic organism consisting of algae and fungi. This natural indicator changes color in response to the acidity or alkalinity of a solution.
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Each question contains a statement followed by Quantity I and II. Read the information clearly and answer your questions accordingly.Â
 Quan...
Determine how many composite numbers exist between 61 and 99?
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