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प्रश्न
What is done to prevent corrosion of metals?
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उत्तर
Corrosion of metals can be prevented by the following methods:
- Applying coatings: Metals are coated with oil, grease, varnish, or paint to prevent direct contact with air and moisture.
- Metal plating: Metals are plated with a non-corroding metal. For example, zinc plating (galvanization) is used to protect iron from rusting.
संबंधित प्रश्न
Explain the term corrosion.
Explain how painting of an iron gate prevents it from rusting.
Explain why Iron sheets are coated with zinc during galvanization.
What is meant by galvanisation? Why is it done?
State two conditions for the rusting of iron.
What is corrosion?
No chemical reaction takes place when granules of a solid, A, are mixed with the powder of another solid, B. However when the mixture is heated, a reaction takes place between its components. One of the products, C, is a metal and settles down in the molten state while the other product, D, floats over it. It was observed that the reaction is highly exothermic.
(i) Based on the given information make an assumption about A and B and write a chemical equation for the chemical reaction indicating the conditions of reaction, physical state of reactants and products and thermal status of reaction.
(ii) Mention any two types of reactions under which above chemical reaction can be classified.
Give reason for the following:
A suspension of rust is basic in nature.
Write the name.
An alloy of copper and tin-
In ______ process a layer of molten tin is deposited on metals.
