Question

Iron nails are kept in three test tubes- A having water, B having boiled water and a layer of oil and C having anhydrous CaCl2. Nails in which test tubes will undergo corrosion. Give reasons.

Answer 1

In the testtube which contains water because of oxidation of iron in water

Answer 2

☆ Hey Ananya ☆

Here is your answer sis......

Your 1st option is correct.Reason is below:---
As all of us know that the required condition for corrosion is the presence of Water and Oxygen. And
A Test tube, water is present in it and oxygen is also present in the dissolved form.
So, it causes corrosion of nail.

B test tube, there is boiled water in it which remove the dissolved oxygen from the water and a layer of oil don't allow the air to come into water.

C test tube, there is CaCl2 is present which absorbs the oxygen. and thus corrosion doesn't take place.

Hope it will help you!
Thanks!