10th Class Science Sample Paper Science Olympiad Model Test Paper-2

  • question_answer
    Which one of the following is an example of decomposition reaction?

    A) \[2KN{{O}_{3}}\to 2KN{{O}_{2}}+{{O}_{2}}\]

    B) \[BaC{{l}_{2}}+{{H}_{2}}S{{O}_{4}}\to BaS{{O}_{4}}+2HCl\]

    C) \[{{C}_{2}}{{H}_{4}}+{{H}_{2}}\to {{C}_{2}}{{H}_{6}}\]

    D) \[CuS{{O}_{4}}+Fe\to FeS{{O}_{4}}+Cu\]

    E) None of these

    Correct Answer: A


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