Iron is rendered passive by treatment with :

CHEMISTRY · Single correct · CBSE · Chemistry · Electrochemistry · Electrochemistry

Problem

Iron is rendered passive by treatment with : a.

\text{H}_2\text{SO}_4

(dil.) b.

\text{H}_2\text{PO}_4

conc.

\text{HNO}_3

(1)

\text{H}_2\text{SO}_4

(dil.) (2)

\text{H}_2\text{PO}_4

(3) conc.

\text{HNO}_3

(4)

\text{HCl}