Two experiments using anhydrous potassium chloride are performed, and the end results are recorded as observations X and Y. First, concentrated sulfuric acid is added to the potassium chloride, and the gases given off are passed into aqueous potassium iodide solution - observation X. Second, the potassium chloride is dissolved in aqueous ammonia, and this mixture is then added to aqueous silver nitrate - observation Y. What are observations X and Y?
- AX: brown solution; Y: colourless solution
- BX: brown solution; Y: white precipitate
- CX: colourless solution; Y: colourless solution
- DX: colourless solution; Y: white precipitate