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  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
    Which of the following changes is accompanied by sound?

    A) Photosynthesis

    B) Spoilage of food

    C) Explosion of fire works

    D) None of these

    Correct Answer: C

    Solution :

    Explosion of fire works


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