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Out of Cu(2)S, HgS, Ag(2)S and ZnS roast...

Out of `Cu_(2)S, HgS, Ag_(2)S and ZnS` roasting will convert the minerals into metal in case of

A

`Cu_(2)S, ZnS`

B

`HgS, ZnS`

C

`Cu_(2)S, Ag_(2)S`

D

`HgS,

Text Solution

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The correct Answer is:
To solve the question regarding which mineral can be converted into metal through roasting, we can follow these steps: ### Step 1: Understand Roasting Roasting is a process in metallurgy where sulfide ores are heated in the presence of oxygen. This process converts sulfides into oxides, releasing sulfur dioxide gas. ### Step 2: Analyze Each Compound We have four compounds to analyze: 1. **Cu₂S (Copper(I) sulfide)** 2. **HgS (Mercury(II) sulfide)** 3. **Ag₂S (Silver sulfide)** 4. **ZnS (Zinc sulfide)** ### Step 3: Roasting Reactions - **Cu₂S**: When roasted, it converts to Cu₂O (copper(I) oxide) and SO₂ gas. Further reduction can yield metallic copper. - **HgS**: When roasted, it converts to HgO (mercury(II) oxide) and SO₂ gas. Upon heating, HgO can decompose to yield metallic mercury. - **Ag₂S**: When roasted, it converts to Ag₂O (silver oxide) and SO₂ gas. Further reduction can yield metallic silver. - **ZnS**: When roasted, it converts to ZnO (zinc oxide) and SO₂ gas. Zinc oxide does not reduce to metallic zinc directly through roasting. ### Step 4: Identify Which Can Yield Metal From the above reactions: - **Cu₂S** can yield metallic copper. - **HgS** can yield metallic mercury. - **Ag₂S** can yield metallic silver. - **ZnS** does not yield metal directly through roasting. ### Conclusion Out of the given options, roasting will convert the minerals into metal in the case of **HgS** (Mercury sulfide), as it can be further reduced to yield metallic mercury. ### Final Answer The correct answer is **HgS**. ---
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