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प्रश्न
What is rust?
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उत्तर
When iron is exposed to moist air, it forms a layer of brown hydrated ferric oxide on its surface. This compound is known as rust and the phenomenon of formation of rust is known as rusting.
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संबंधित प्रश्न
Give two examples of alloys with their chemical composition.
The corrosion of copper produces a ______ coating of basic copper carbonate on its surface.
What is the corrosion of iron known as?
A metal X which is resistant to corrosion is produced by the electrolysis of its molten oxide whereas another metal Y which is also resistant to corrosion is produced by the reduction of its oxide with carbon. Metal X can be used in powder form in thermite welding whereas metal Y is used in making cathodes of ordinary dry cells.
- Name the metals X and Y.
- Which of the two metals is more reactive: X or Y?
- Name one ore or metal X. Also write its chemical formula.
- Name one ore of metal Y. Also write its chemical formula.
- Name one alloy of metal X and one alloy of metal Y.
Name the metal which is a constituent of plant pigment?
Give a reason why rust turns moist red litmus blue.
Pressure cooker : Anodizing : : Silver plated spoons : _______
Write a molecular formula for rust.
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?
Gold plated ornaments is the example of ______.
