In an aqueous environment, the microscopic animals are collectively called

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  1. Solution

    The correct answer is Sulphurous acid.

    Explanation:

    When sulphur dioxide is dissolved in water it forms Sulphurous acid. The chemical formula of sulphur dioxide is SO2.
    The chemical equation is shown below.

    • SO2 +H2O ⟶ H2SO3
    • Metallic oxides are formed when metals react with oxygen. Because they react with water to form bases, these metallic oxides are basic in nature.
    • Non-metals, on the other hand, react with oxygen to form non-metallic oxides, which differ from metallic oxides in that they are acidic. Non-metallic oxides also form acids when they react with water.
    • Sulphur is a non-metallic element, and sulphur dioxide (SO2) is acidic. As a result, it reacts with water to produce sulphurous acid (H2SO3)
    • Properties of Sulphurous acid:
      • Sulphurous acid is a colourless liquid.
      • Sulphurous acid is a good reducing agent.
      • It is used as a mild bleaching agent for applications.
      • Sulphurous acid is unstable and has never been isolated in it its pure states.

    Additional Information

    • Sulphur Trioxide
      •  It reacts violently with water to form sulfuric acid with the release of heat.
    • Sulphur Pentaoxide
      • No direct reaction.
    • Sulphuric Acid
      • Water is less dense than sulfuric acid and will tend to float above the acid.
      • The reaction is best thought of as forming hydronium ions.

    Mistake Points

    •  Sulfur dioxide dissolves in water to give solutions that contain sulfurous acid H2SO3
    • 2 SO2 (aq) + 2 H2O (l) + O2 (g) → 2 H2SO4(aq)  formation of the sulphuric acid from the sulphur dioxide.
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