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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
    Which is the best method to prevent rusting?

    A) Painting                      

    B) Greasing

    C) Galvanization    

    D) Precipitation

    Correct Answer: C

    Solution :

    Galvanizing is an ideal method to prevent rusting.      


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