JEE · NEET Previous Year Question
Incorrect statement for the use of indicators in acid-base titration is :
Topic: JEE PYQ
Answer: A. Full step-by-step solution below.
- AMethyl orange may be used for a weak acid vs weak base titration.
- BMethyl orange is a suitable indicator for a strong acid vs weak base titration
- CPhenolphthalein is a suitable indicator for a weak acid vs strong base titration
- DPhenolphthalein may be used for a strong acid vs strong base titration.
Correct answer: A
Solution
(a)Indicator pH range
Methyl orange 3.2-4.5
Phenolpthalein 83 - 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.
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