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प्रश्न
What is done to prevent rusting of the iron door of your house?
लघु उत्तर
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उत्तर
- To apply a layer of a substance to the metal surface so that the metal does not come into touch with moisture or oxygen in the air, and no reaction occurs.
- To protect metals from corrosion, apply a layer of paint, oil, grease, or varnish to their surfaces.
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