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प्रश्न
Name five methods of preventing rusting of iron.
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उत्तर
- Rusting of iron can be prevented by painting.
- Rusting of iron can be prevented by applying grease or oil.
- Rusting of iron can be prevented by galvanisation.
- Rusting of iron can be prevented by tin-plating and chromium plating.
- Rusting of iron can be prevented by alloying it to make stainless steel.
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संबंधित प्रश्न
Give two examples of alloys with their chemical composition.
Why do we apply paint on iron articles?
Choose the correct answer from the options given below:
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as
A. Smelting
B. Ore-dressing
C. Calcination
D. Bessemerisation
Name the metal which is used for galvanising iron.
In one method of rust prevention, the iron is not coated with anything. Which is this method?
The corrosion of iron is called ______.
What is corrosion?
Name the metal which is a constituent of blood pigment?
Explain how the activity series accounts for each of the following:
tendency to corrosion
What is done to prevent corrosion of metals?
What are the adverse effects of corrosion?
Choose the correct alternative and rewrite the following:
Iron is _____________________.
Give reason.
An iron article should be given a coat of paint
_______ is an alloy made from iron, carbon and chromium.
Find the odd one out and give its explanation.
Complete flow chart given below.
What is rust?
Give the equation for the formation of rust.
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.
