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Question

The acidic or basic nature of a substance is tested by using:
  1. Indicator
  2. Litmus paper
  3. Both A and B
  4. Salt solution

A
Litmus paper
B
Indicator
C
Salt solution
D
Both A and B
Solution
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The correct option is D Both A and B
litmus paper is used to detect the acidic or basic nature of a substance. Color of litmus paper in acid: Blue litmus paper turns red when dipped in acidic solution.
Acid-Base indicators (also known as pH indicators) are substances that change color with ph.

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