1
JEE Main 2026 (Online) 28th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Method used for separation of mixture of products ( B and C ) obtained in the following reaction is
2
JEE Main 2026 (Online) 23rd January Evening Shift
MCQ (Single Correct Answer)
+4
-1
In Carius method 0.2425 g of an organic compound gave 0.5253 g silver chloride. The percentage of chlorine in the organic compound is
3
JEE Main 2026 (Online) 23rd January Morning Shift
MCQ (Single Correct Answer)
+4
-1
$$ \text { Match List - I with List - II. } $$
| List - I Functional group (detection) |
List - II Change observed during detection |
||
|---|---|---|---|
| A. | Unsaturation (Baeyer's test) | I. | Red colour appears |
| B. | Alcoholic group (Ceric ammonium nitrate test) | II. | Silver mirror appears |
| C. | Aldehyde group (Tollen's reagent) | III. | Violet colour appears |
| D. | Phenolic group ( $\mathrm{FeCl}_3$ test) | IV. | Discharge of pink colour |
4
JEE Main 2026 (Online) 22nd January Evening Shift
MCQ (Single Correct Answer)
+4
-1
When 1 g of compound $(\mathrm{X})$ is subjected to Kjeldahl's method for estimation of nitrogen, 15 mL 1 M $\mathrm{H}_2 \mathrm{SO}_4$ was neutralized by ammonia evolved. The percentage of nitrogen in compound $(\mathrm{X})$ is :
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