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प्रश्न
What is rust ?
उत्तर १
Rust: Rust is hydrated ferric oxide (Fe2O3 . x* H2O), which forms a brownish red coating over iron. (* x can be any number.)
उत्तर २
The hydrated oxide of iron formed when iron comes in contact with moist air is called rust. This rust is brownish flaky residue and easily crumbles from the metal surface.
4Fe + 3O2 → 2Fe2O3
Iron Oxygen Ferric oxide
संबंधित प्रश्न
A mixture of oxygen and carbon dioxide used for artificial respiration.
Fill in the blanks :
Oxides of sulphur and nitrogen combine with rain water to form ___________ and _________ which cause ____________.
What happens when Iron burns in oxygen ? Also give the balanced chemical equation for the reaction.
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
To prevent rusting, the underside of the ships is coated with __________________.
How will you prove that oxide formed by burning sodium is basic in nature?
Write fully balanced equation for the following :
MgO + H2O →
Describe simple experiments to show the presence of -
water vapour in air using a glass tumbler and ice.
In the laboratory preparation of oxygen from hydrogen peroxide answer the following:
State the method of collection of the oxygen gas giving reasons.
Give reason for the following:
Combustion and respiration show similarity.
A process without emitting flame is called as ______.
