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10th Class Science Sample Paper Science Olympiad Model Test Paper-21

  • question_answer
    Identify the substance which is reduced in the reaction given below. \[PbS+4{{H}_{2}}{{O}_{2}}\to PbS{{O}_{4}}+4{{H}_{2}}O\]

    A) Hydrogen peroxide

    B) Lead sulphide

    C) Both lead sulphide and hydrogen peroxide

    D)  Water

    E)  None of these

    Correct Answer: A

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