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Standard VII
Chemistry
Rusting
Question

Three test tubes are taken and labelled as $$A, B$$ and $$C$$. In test tube $$A$$ iron nail is dipped in water. In test tube $$B$$ iron nail is dipped in mixture of water and oil and in test tube $$C$$ iron is added with dry calcium chloride.
Name the test tube in which the iron nail will rust and why?

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Solution
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The iron nail will rust in test tube $$A$$ because it provides the condition required for rusting, both moisture as well as air is present in it.

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Q1
Three test tubes are taken and labelled as $$A, B$$ and $$C$$. In test tube $$A$$ iron nail is dipped in water. In test tube $$B$$ iron nail is dipped in mixture of water and oil and in test tube $$C$$ iron is added with dry calcium chloride.
Name the test tube in which the iron nail will rust and why?
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Q2
In three test tubes P, Q and R iron nails, water, oil and anhydrous calcium chloride is taken. Among these test tubes, in which test tubes corrosion of nails will not take place?
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