What is external indicator
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external indicators r indicators which are added from outside to detect the change in pH
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Internal indicators are those in which one of the reactant act as self indicator. Eg KMnO4 act as self indicator in Permanganate titrations. External indicators are which are added from outside and detects the change in pH etc. eg Phenolphthalein and Methyl Orange added in Acid base titrations.
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