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A sulphide ore (A) on roasting leaves a ...

A sulphide ore `(A)` on roasting leaves a residue `(B)`. `(B)` on heating with chlorine gives `(C )`, sulphide in water, addition of excess potassium iodide to a solution of `(C )` gives a solution `(D)` A brown precipitate `(E)` is formed when a solution of ammonium sulphate is added to an alkaline a solution of `(D)`. Identify `(A)` to `(E)`.

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To solve the problem step by step, we will identify each component from `(A)` to `(E)` based on the reactions described in the question. ### Step-by-Step Solution: 1. **Identify Sulphide Ore (A)**: - The question states that a sulphide ore `(A)` on roasting leaves a residue `(B)`. - A common sulphide ore is **Mercury Sulphide (HgS)**. When HgS is roasted (heated in the presence of oxygen), it produces **Mercury(II) Oxide (HgO)**. - Therefore, **(A) = HgS**. ...
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