The best way to prevent the corrosion of iron is to paint the exposed iron with protective paint, because that prevents water from rusting the iron.
I think it is c because food and clothing aren't technically chemicals however they do contain them so d is a possible answer but I think it is c
Particles of gas are more scarcely placed as compared to that of liquid.
the intermolecular forces will be less in gaseous state and hence is less stable
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