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

  • question_answer
    The shipping industry has to bear huge financial loss because of rusting of ships. The rusting of ships occur because:

    A) the body of ship is always in contact with water.

    B) the air around the ship is humid.

    C) presence of salts in sea water speed up the process of rusting.

    D) All of the above

    Correct Answer: D

    Solution :

    Rusting is a phenomena of formation of oxide layer on metal surface in presence of air and moisture.


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