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प्रश्न
Write two methods of preventing the rusting of iron.
State two ways to prevent the rusting of iron.
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उत्तर
- The rusting of iron can be prevented by painting, oiling, greasing or varnishing its surface.
- Galvanisation is another method of protecting iron from rusting by coating it with a thin layer of zinc.
संबंधित प्रश्न
What is an alloy?
Explain the term corrosion.
What special name is given to the corrosion of iron?
What type of chemical reaction is involved in the corrosion of iron?
Explain why, iron sheets are coated with zinc.
______ and ______ are necessary for the rusting of iron.
Name five methods of preventing rusting of iron.
Bronze is an alloy of ______.
Observe the following picture a write down the chemical reaction with the explanation.
Answer the following question.
List two properties of alloys.
Give reason for the following:
A suspension of rust is basic in nature.
Write the name.
An alloy of copper and tin-
Write scientific reason.
Coins are made from metals and alloys.
Write a molecular formula for rust.
Give the equation for the formation of rust.
Amalgam is an alloy of ____________.
The table shown below gives information about four substances: A, B, C and D.
| SUBSTANCE | MELTING POINT (K) | ELECTRICAL CONDUCTIVITY | |
| SOLID | LIQUID/ AQUEOUS | ||
| A | 295 | Good | Good |
| B | 1210 | Poor | Good |
| C | 1890 | Poor | Good |
| D | 1160 | Poor | Poor |
Identify Ionic compounds from the above given substances.
Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?
Galvanisation is a process used to prevent the rusting of which of the following?
Describe two changes that are harmful. Explain why you consider them harmful. How can you prevent them?
