Question

# Iron is galvanized by coating it with:A.nickelB.chromiumC.copperD.zinc

Hint: We all heard about rusting of iron. In common language, the red layer that has appeared in the iron surface when it is kept for a long time in open is termed as rusting of iron. Rusting destroys the metal so it is very necessary for us to prevent rusting.

$4{\rm{Fe}} + 3{{\rm{O}}_{\rm{2}}} + 2x{{\rm{H}}_{\rm{2}}}{\rm{O}} \to {\rm{2F}}{{\rm{e}}_2}{{\rm{O}}_{\rm{3}}}x{{\rm{H}}_{\rm{2}}}{\rm{O}}$