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  4. Incorrect statement for the use of indicators in acid-base titration is :

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Q. Incorrect statement for the use of indicators in acid-base titration is :

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Solution:

Indicator $\,\,\, \,\,\,\,\,\,\,$ pH range
Methyl orange $\,\,\, $3.2 - 4.5
Phenolpthalein $\,\,\, $8.3 - 10.5
Methyl orange may be used for a strong acid vs strong base and strong acid vs weak base titration. Phenolpthalein may be used for a strong acid vs strong base and weak acid vs strong base titration