MCQ
Iodine is released when potassium iodide reacts with
- A$ZnS{O_4}$
- ✓$CuS{O_4}$
- C$FeS{O_4}$
- D${(N{H_4})_2}S{O_4}$
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| Column $I$ | Column $II$ |
| $Image$ | $(p)$ sodium fusion extract of the compound gives Prussian blue colour with $\mathrm{FeSO}_4$ |
| $Image$ | $(q)$ gives positive $\mathrm{FeCl}_3$ test |
| $Image$ | $(r)$ gives white precipitate with $\mathrm{AgNO}_3$ |
| $Image$ | $(s)$ reacts with aldehydes to form the corresponding hydrazone derivative |

