Advertisements
Advertisements
Question
Explain the term – rusting and give a word equation for the formation of rust. If polished iron nails are kept in three separate test tubes, state the contents in each test tube required, to prove the conditions for rusting.
Advertisements
Solution
The term Rusting involves slow oxidation of iron in presence of air and moisture which results in the formation of rust i.e. hydrated iron [III] oxide.
THE OXIDATION REACTION
Rusting of Iron
Iron + Oxygen → Iron [III] oxide Rust Hydrated iron [III] oxide
\[\ce{4Fe + 3O2 -> 2Fe2O3->[X H2O][moisture] Fe2O3.x H2O}\]
Iron when exposed to the atmosphere slowly reacts with the oxygen of the air, in the presence of moisture forming a brown coating called ‘rust’ on its surface. Rusting corrodes iron and reduces its structural strength.
APPEARS IN
RELATED QUESTIONS
Why do we apply paint on iron articles?
Name any three objects (or structures) which are gradually damaged by the corrosion of iron and steel.
With the help of labelled diagrams, describe an activity to find out the conditions under which iron rusts.
Give a reason why rust turns moist red litmus blue.
State whether the statement given below is true or false. If false write the correct statement.
Graphite is a lustrous non-metal which conducts electricity.
To prevent corrosion of iron and steel _______ method is used.
Stainless steel is an alloy of _______.
Write the name.
Method used to present corrosion of copper.
The process of coating the surface of the metal with a thin layer of zinc is called ______
State two conditions necessary for rusting of iron.
