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Question

What are natural indicators? Give examples. What are universal indicators?


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Solution

Natural indicators

  • Indicators are helpful in determining the acidic or basic nature of a given substance.
  • When indicators are added to acidic or basic solutions, they change their color accordingly.
  • Natural indicators are those which can be extracted by plants.
  • For example: lichens, turmeric, china rose, and red cabbage.

Universal indicators

  • Universal indicators are made up of various different indicators. These indicators provide different colors at different pH values.
  • They help in estimating how much acidic or basic a substance is.
  • Litmus is the most basic universal indicator.

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