Select an Unknown Sample
Each tube holds one unknown carbonyl compound. Run tests, record your reasoning, then deduce the identity — the labels are hidden until you reveal.
⚠️ Safety
- Tollens' reagent must be freshly prepared and discarded immediately — on standing it can form explosive silver fulminate/nitride.
- Solid 2,4-DNP is explosive when dry; keep it moistened and handle the reagent as toxic/harmful.
- Fehling's test needs a hot water bath — beware scalds and hot glassware.
- Iodoform uses iodine and NaOH — corrosive/irritant; CHI₃ vapour is an irritant.
- Aldehydes and acetone are volatile and flammable; keep away from flames and work in a fume cupboard.
- Wear goggles and gloves; wash hands after handling reagents.
Perform Tests
Select a compound
Result
Observation
Select a sample and perform a test
Interpretation
-
-
Your Deduction
Run at least 2 tests on the selected sample, decide what it is, and give your evidence before revealing the identity.
📊 Summary
| Test | Aldehydes | Ketones | Differentiates? |
|---|---|---|---|
| Tollens' | ✓ Positive | ✗ Negative | Yes |
| Fehling's | ✓ Aliphatic only | ✗ Negative | Yes |
| 2,4-DNP | ✓ Positive | ✓ Positive | No (both +ve) |
| Iodoform | CH₃CHO only | CH₃CO- only | Specific groups |
Observations
Select compound to begin...