Question

answer the quetion with reason​

Answer 1

Answer:

a. the layer of oil prevents the contact of oxygen with the iron nail hence it is not rusted.

b. due to the contact of nail with water and air in the test tube the nail gets oxidized.

c. yes it will.

Explanation:

Answer 2

Explanation:

a. The nail in the test tube 2 is not rusted because nail becomes rusted when water and air together act on it to form rust, but in test tube 2 only water is in contact with the nail and due to the layer of oil over the layer of water, air is not able to come in contact with the nail.

b. The nail in the test tube is formed because water and air together react and come in contact with the nail producing rust ( Fe2O3.xH2O ).

c. Calcium Chloride is a strong hygroscopic agent i.e. it absorbs water. In the test tube 3 as the nail is surrounded by calcium chloride so there is an absence of water in the test tube and air alone cannot produce rust, so the nail in the test tube 3 will not get rusted.

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