1. A special container with tubes P, Q, R, S and T , Tubes P, Q, R and S have stoppers at the top. What will happen to the water level in the different tubes if the stoppers in only P, R and S are removed?
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Answer:
Correct option is D)
In test tubes Q and R, corrosion of nails will not take place.
For corrosion to take place, air ( or oxygen), water and iron, all three should be in contact.
In test tube Q, layer of oil separates air from nails and boiled distilled water.
In test tube R, anhydrous calcium chloride ensures that no moisture is present.
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