Match the following:

| | Test/Method | | Reagent |
|---|---|---|---|
| A. | Lucas Test | I. | / aq. KOH |
| B. | Dumas method | II. | |
| C. | Kjeldahl's method | III. | , heat |
| D. | Hinsberg Te

Question

Match the following:

| | Test/Method | | Reagent |
|---|---|---|---|
| A. | Lucas Test | I. |  / aq. KOH |
| B. | Dumas method | II. |  |
| C. | Kjeldahl's method | III. | , heat |
| D. | Hinsberg Test | IV. | Conc. HCl and  |
| | | V. |  |

Canvas Classes · Accepted Answer

Step 1: Identify Each Test and Its Reagents

A. Lucas Test
- Used to distinguish 1°, 2°, 3° alcohols
- Reagent: Lucas reagent = conc. HCl + anhydrous  (as Lewis acid catalyst)
- 3° alcohol → immediate cloudiness; 2° → cloudiness in ~5 min; 1° → no reaction (or very slow)
- Match: IV (Conc. HCl and )

B. Dumas method
- Used for nitrogen estimation
- Reagent: The organic compound is heated with excess CuO (which provides O for oxidation)
- The gases are passed through CuO layer → then over copper

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