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9th Class Science Sample Paper Science Olympiad Model Test Paper-21

  • question_answer
    Which law of chemical combination says that in a chemical reaction, total mass of the products is equal to the total mass of reactants?

    A) Law of constant proportion

    B) Law of multiple proportion

    C) Law of conservation of mass

    D) Law of reciprocal proportions

    E) None of these

    Correct Answer: C

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