2. Questions Bank
  3. 7th Class
  4. Science
  5. Physical and Chemical Changes

7th Class Science Physical and Chemical Changes Question Bank Physical and Chemical Changes

  • question_answer
    Original substances participating in a chemical reaction are __ and the new substances formed are known as the ____.

    A) Products, reactants

    B)        Catalysts, Reactants

    C) Reactants, products

    D) Products, Catalysts

    E) None of these

    Correct Answer: C

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