Question

Give  scientific  reason:
Iron  articles  rust  readily  whereas  steel  which
is  also  mainly  made  of  iron  will  not  undergo
corrosion.

MSCERT Class 10 General Science Ch2 The Magic of Chemical Reactions

Answer 1

i.                     One of the properties of iron is that it reacts with oxygen in the presence of moisture and gets corroded by forming rust(Fe2O3.x H2O).


ii.                    Air contains oxygen and moisture. Hence, iron readily rust when exposed to air.


iii.                  Steel (stainless steel, not mild steel) is an alloy of iron having the property to resist corrosion including rusting.
Hence, stainless steel, though it contains iron, does not undergo corrosion.

Answer 2

Answer:

1.. One of the properties of iron is that it reacts with oxygen in the presence of moisture and gets corroded by forming rust.

2.. Air contains oxygen and moisture.Hence, iron readily rust when exposed to air.

3.. Steel is not is an alloy of iron having the property to resist corrosion including rusting.Therefore, stainless steel,though it contains iron ,does not undergo corrosion.