Given below is the chemical reaction that happens when iron rusts. Iron and Oxygen react


Given below is the chemical reaction that happens when iron rusts. Iron and Oxygen react (in presence of water) and forms iron oxide (rust). In which of the following case (s) would the iron nail rust when left for a few days?
(i)an iron nail lying in a garden
(ii) an iron nail lying at the bottom of a pond
(iii)an iron nail lying in a bottle of refined oil
(iv) an iron nail in a cylinder having pure oxygen and nothing else
OPTIONS:
only (i)
only (i) and (ii)
only (i) and (iii)
only (i) and (iv)


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