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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
    For protection of iron pipes from corrosion they are coated with

    A) Silver             

    B) Copper

    C) Aluminum                   

    D) Zinc

    Correct Answer: D

    Solution :

    Iron pipes are coated with zinc and process is called galvanization


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