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प्रश्न
Give reason.
An iron article should be given a coat of paint
उत्तर
Iron articles often undergo rusting, resulting in the formation of a reddish-brown layer on their surface. Rusting is caused by the exposure of iron to the air and water in the surroundings. An iron article that is coated with paint prevents the interaction of iron with the surrounding air and water and thus protects it from rusting.
संबंधित प्रश्न
Fill in the following blank with suitable word:
The process of depositing a thin layer of zinc on iron articles is called .............
Name two metals which resist corrosion due to the formation of a thin, hard and impervious layer of oxide on their surface.
Name the metal which is a constituent of plant pigment?
Give reason.
Copper and brass utensils should be tinned.
State whether the statement given below is true or false. If false write the correct statement.
Either oxygen or moisture is essential for rusting.
_______ forms a green colour in the water.
Match the columns.
| Group A | Group B |
| 1) Electroplating | a) Pressure cooker |
| 2) Anodising | b) Silver plated spoons |
| c) Coating of tin on copper | |
| d) Coating of Zinc on iron |
Write the name.
Method used to prevent corrosion of copper.
Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the following alloys contain non-metal as one of its constituents?
Describe two changes that are harmful. Explain why you consider them harmful. How can you prevent them?
