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Why in the manufacture of H2 SO4 by cont...

Why in the manufacture of `H_2 SO_4` by contact process, sulphur trioxide is not directly dissolved in water ?

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### Step-by-Step Solution: 1. **Understanding the Contact Process**: The contact process is an industrial method used for the manufacture of sulfuric acid (H₂SO₄). It involves the oxidation of sulfur dioxide (SO₂) to sulfur trioxide (SO₃) in the presence of a catalyst. 2. **Formation of Sulfur Trioxide**: In the contact process, sulfur (S) is burned in the presence of oxygen (O₂) to produce sulfur dioxide (SO₂). This SO₂ is then further oxidized in the presence of excess oxygen to form sulfur trioxide (SO₃). 3. **Reactivity of Sulfur Trioxide with Water**: Sulfur trioxide is highly reactive with water. If SO₃ is directly dissolved in water, it reacts vigorously to form sulfuric acid (H₂SO₄). This reaction is exothermic, meaning it releases a significant amount of heat. ...
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Knowledge Check

  • Sulphur trioxide is not directly dissolved in water to form sulphuric acid because

    A
    1. `SO_(3)` does not react with water to form acid
    B
    2. `SO_(3)` gets oxidised to `H_(2)SO_(3)` when dissolved in water
    C
    3. it results in the formation of dense fog of sulphuric acid which is difficult to condense
    D
    4. sulphur trioxide is insoluble in water due to its covalent nature.

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