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

  • question_answer
    DIRECTIONS: On the basis of following diagram/picture answer the questions given below: Three substances given below are kept in the open for a few days and some changes were observed. Which of the substances will show chemical changes?

    A) Eggs

    B) Plastic bottle

    C) Both eggs & moth balls

    D) All eggs, plastic bottle and moth balls

    Correct Answer: A

    Solution :

    Eggs will rotten to give foul smell. Bottle will remain as such whereas moth balls will sublime which is a physical change.


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