Question

1. In which of the test tubes given in the picture some change would be observed on the iron nail?

2. What is the change observed?

3. What is the phenomenon called?

4. Can this change be reversed?

5. What is the role played by anhydrous calcium chloride.​

Answer 1

Answer:

Correct option is

D

Q and R

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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Explanation:

Answer 2

Answer:

4 is correct answer I think that is