Given below are two statements: Statement I: In redox titration, the indicators used are sensitive to change in pH of…
Redox Reactions · Class 11 · JEE Main Previous Year Question
Given below are two statements:
Statement I: In redox titration, the indicators used are sensitive to change in pH of the solution. Statement II: In acid-base titration, the indicators used are sensitive to change in oxidation potential.
In the light of the above statements, choose the most appropriate answer from the options given below:
- a
Statement I is correct but Statement II is incorrect
- b✓
Both Statement I and Statement II are incorrect
- c
Statement I is incorrect but Statement II is correct
- d
Both Statement I and Statement II are correct
Both Statement I and Statement II are incorrect
Step 1 — Evaluate Statement I: In redox titrations, indicators (e.g., ferroin, diphenylamine) are sensitive to changes in oxidation potential (redox potential), NOT pH. Statement I is INCORRECT ✗
Step 2 — Evaluate Statement II: In acid-base titrations, indicators (e.g., phenolphthalein, methyl orange) are sensitive to changes in pH, NOT oxidation potential. Statement II is INCORRECT ✗
Conclusion: Both statements have the descriptions swapped — each describes the wrong type of titration.
Answer: Option (2) — Both Statement I and Statement II are incorrect
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