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Iron is not attacked by

$(a)\;\text{Steame} \\(b)\;\text{dilute$H_2SO_4$} \\(c)\;\text{Dilute NaOH } \\ (d)\;\text{Concentrated$NaOH$}$
Can you answer this question?

Iron is not attacked by Dilute $NaOH$
Hence c is the correct answer.
answered Mar 17, 2014 by