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प्रश्न
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.
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उत्तर
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
संबंधित प्रश्न
State two conditions for the rusting of iron.
What is the corrosion of iron known as?
Name five methods of preventing rusting of iron.
Explain with reason:
Roasting is carried out on sulphide ores and not on carbonate ores.
Answer the following question:
What is corrosion? Do gold ornaments corrode? Justify.
Give reason.
A wooden article should be polished.
Observe the following picture and answer the following questions:
- What is rust?
- Write the chemical formula of rust.
- Write the reaction of oxidation of iron at the anode.
- Write the reaction of oxidation of iron at the cathode.
- What is corrosion?
Give preventive methods by giving examples of corrosion?
Marble’s popularity began in ancient Rome and Greece, where white and off-white marble were used to construct a variety of structures, from hand-held sculptures to massive pillars and buildings.
The substance not likely to contain CaCO3 is:
Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
