7th Class Science Sample Paper Science Sample Paper - 1

  • question_answer
    Explain how painting of an iron gate prevents it from rusting.

    Answer:

    We know that rusting takes place in presence of oxygen and water. If we somehow, prevent the oxygen and water from coming in contact with iron articles, there will he no rusting Hence if iron gates are painted all over, then they will not come in contact with oxygen and water; and consequently no rusting will occur on the gates.


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