Identify the gas in the following :
Gas produced on reaction of dilute sulphuric acid with a metallic sulphite .

Explanation

To identify the gas produced when dilute sulfuric acid reacts with a metallic sulfide, we can follow these steps:

### Step 1: Understand the Reaction
When dilute sulfuric acid (H₂SO₄) reacts with a metallic sulfide (MX, where M is a metal), a chemical reaction occurs. The general reaction can be written as:
\[ \text{Metallic Sulfide (MX)} + \text{Dilute Sulfuric Acid (H₂SO₄)} \rightarrow \text{Metal Sulfate (MSO₄)} + \text{Gas (H₂S)} \]

### Step 2: Identify the Products
In this reaction, the metallic sulfide reacts with sulfuric acid to produce a metal sulfate and hydrogen sulfide gas (H₂S). The metal sulfate is formed from the metal (M) and the sulfate ion (SO₄²⁻).
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