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  3. 7th Class
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  5. Physical and Chemical Changes

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

  • question_answer
    Gas evolving when acetic acid gets reacted with baking soda.

    A) Hydrogen                      

    B) Carbon dioxide

    C) Nitrogen            

    D) Argon

    E) None of these

    Correct Answer: B

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