10th Class Science Sample Paper Science Sample Paper-2

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

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

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

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

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

    E) None of these

    Correct Answer: B


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