Question

observe the given experiment set up and answer the questions that follows.
pls help me​

Answer 1

Answer:

i.because rusting takes place by the action of water and oxygen.here oil deprives the nail of the oxygen , so it does not rust.

ii.cacl2 absorbs water .to show that rusting does not takes place in the absence of water.

iii.

we can conclude that rusting takes place only in the presence of air and water