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

  • question_answer
    We mm on a bulb and filament changes its colour and becomes bright. Is it chemical change like burning?

    A) No, filament bum itself but that is not chemical change

    B) Yes, filament bums itself like wood to give light

    C) No, filament does not change into something new

    D) Yes, filament made up of tungsten changes to its oxide on burning

    Correct Answer: C

    Solution :

    No, it is a physical change and no new substance is formed


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