On adding a few drops of dilute sulphuric acid to the blue vitriol (copper sulphate) solution, we get a blue colored solution. When we drop a shaving blade into this blue colored solution blue color changes to green and a brown deposit appears on the iron nails. Predict the brown deposits on iron nails. a) iron on iron nails. B) copper on iron nails. C) copper sulphate on iron nails . D) iron sulphte on iron nails