Tamilnadu BoardEnglish MediumSTD 8ScienceAcids and Bases.2 Marks
Question
What is an indicator? Name three common indicators.
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Answer
Indicators are substances that show a distinct change (colour or odour) simultaneous to a change in concentration of ions such as H+ and OH- ions. Examples: Methyl orange, phenolphthalein and litmus solution.
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