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A metal m of moderate reactivity is present as it sulphide x on heating in air X convert into its oxide why and a gas evolve on heating by an x together the metal m is produced X and respectively are?
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A metal m of moderate reactivity is present as it sulphide x on heatin...
Understanding Metal Sulfides and Their Reactions
In chemistry, when a metal of moderate reactivity is present in the form of its sulfide, heating it in the presence of air leads to interesting transformations. Here’s a detailed explanation of the process:
Formation of Metal Oxide
- When the sulfide (X) is heated in air, it reacts with oxygen.
- The general reaction can be represented as:
\[
\text{Metal Sulfide (MS)} + \text{O}_2 \rightarrow \text{Metal Oxide (MO)} + \text{SO}_2 \uparrow
\]
- Here, the metal (M) reacts with sulfur (S) to produce its oxide (MO) and sulfur dioxide (SO₂) gas, which is responsible for the evolution of gas during the reaction.
Why Does This Reaction Occur?
- Metals of moderate reactivity, such as zinc or iron, have the ability to displace sulfur from their compounds when sufficient heat and oxygen are provided.
- The reaction is thermodynamically favorable, leading to the formation of stable metal oxides and the release of a gas.
Identification of Metal and Sulfide
- The metal (M) produced after heating the sulfide is generally a transition metal. For example:
- If the metal is zinc (Zn), then the sulfide (X) is zinc sulfide (ZnS).
- The reaction would yield zinc oxide (ZnO) and sulfur dioxide (SO₂).
Conclusion
- In summary, the metal sulfide (X) undergoes oxidation upon heating in air, resulting in the formation of its corresponding metal oxide (MO) and the release of sulfur dioxide gas (SO₂).
- This process exemplifies the reactivity of certain metals with oxygen and their ability to form stable oxides.
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A metal m of moderate reactivity is present as it sulphide x on heating in air X convert into its oxide why and a gas evolve on heating by an x together the metal m is produced X and respectively are?
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