Distinguish two organic compounds
“Give a chemical test to distinguish between…” - type the two compounds and get every test that tells them apart, with the reagent and what each one shows.
Answer
Warm or treat each with I2 and NaOH, warm: propan-2-ol gives yellow precipitate of iodoform, CHI3, 2-methylpropan-2-ol gives no change.
Every test that tells them apart
| Test | Reagent | propan-2-ol | 2-methylpropan-2-ol |
|---|---|---|---|
| Iodoform | I2 and NaOH, warm | yellow precipitate of iodoform, CHI3 | no change |
| Lucas | Lucas reagent (conc. HCl + anhydrous ZnCl2) | turbidity in about 5 minutes | turbidity at once |
The two compounds
alcohol, CH3CH(OH)-
alcohol
Practise on real ISC questions
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