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प्रश्न
What is rust ?
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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.
What do you observe when Magnesium is heated and then tested with moist blue and red litmus – paper?
Fill in the blanks :
Oxides of sulphur and nitrogen combine with rain water to form ___________ and _________ which cause ____________.
State and explain two ways by which air gets polluted in nature.
What happens when Sodium 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?
Describe simple experiments to show the presence of -
oxygen and nitrogen component in air using a bell jar
Name the following:
The pollutant which combines with water vapour to give sulphuric acid – a product of acid rain.
In Rockets, along with fuel, oxygen is also carried for combustion – why?
