Question

Let there are three sealed test tubes (A, B and C) containing iron nails under different
conditions. Test tube A is half filled with water and nails are dipped in it. Test tube B
contains NaCl solution in place of water, while test tube C contains nails and silica gel
crystals in place of water or NaCl solution. Explain the observation in each case with
possible mechanism?

Answer 1

Answer:

so in A iron + water forms iron rust ie fe304.xh20ie rust

is B fe+h20+nacl=severe rusting due to electrolytic nature of aa nacl cause ion formatn

in c ica gel impregnated with iron(III) salts functions as a humidity indicator, turning from a deep amber color when dry, to nearly colorless when humidi- fied. ... Silica gel has been used as a desiccant for many years to protect sensitive materials from damage due to excess humidity hence no rusting