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    Chemistry
    Grade-10
    Easy

    Question

    Which of the following chemical equations represent a decomposition reaction?

    1. H2SO3 → H2O + SO2
    2. 2K + 2H2O → 2KOH + H2
    3. None of the above
    4. Two of the above

    hintHint:

    A decomposition reaction can be said as a chemical reaction in which one reactant breaks down into two or more products. 

    The correct answer is: H2SO3 → H2O + SO2

      straight H subscript 2 SO subscript 3 space rightwards arrow space straight H subscript 2 straight O space plus space SO subscript 2 represents a chemical decomposition reaction.
      • In decomposition reactions, a single reactant breaks down to give simpler products. 
      • Such a reaction is one in which a chemical substance disintegrates into two or more components.
      • As was previously said, these reactions typically need heat to take place.

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