Given below are two statements: Statement I: Methyl orange is a weak acid. Statement II: The benzenoid form of methyl…
Ionic Equilibrium · Class 11 · JEE Main Previous Year Question
Given below are two statements:
Statement I: Methyl orange is a weak acid.
Statement II: The benzenoid form of methyl orange is more intense/deeply coloured than the quinonoid form.
Choose the most appropriate answer:
- a
Both Statement I and Statement II are incorrect
- b
Statement I is incorrect but Statement II is correct
- c
Both Statement I and Statement II are correct
- d✓
Statement I is correct but Statement II is incorrect
Statement I is correct but Statement II is incorrect
Step 1 — Evaluate Statement I: Methyl orange is indeed a weak acid (it is an azo dye that acts as a weak acid indicator). Statement I is correct ✓
Step 2 — Evaluate Statement II:
- Quinonoid form (acidic medium, red/pink): more intensely coloured due to extended conjugation
- Benzenoid form (basic medium, yellow): less intensely coloured
- The quinonoid form is MORE deeply coloured than the benzenoid form
- Statement II is incorrect ✗ (it says benzenoid is more intense, which is wrong)
Answer: Option (4) — Statement I correct, Statement II incorrect
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