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प्रश्न
Give two examples of alloys with their chemical composition.
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उत्तर
Examples:
| Name of the alloy | Composition |
| Duralumin | Al + Cu + Mg + Mn |
| Brass | Cu + Zn |
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संबंधित प्रश्न
Write two methods of preventing the rusting of iron.
Write a chemical equation to show the process of corrosion of iron.
What special name is given to their corrosion of iron?
The chemical reaction involved in the corrosion of iron metal is that of:
(a) oxidation as well as displacement
(b) reduction as well as combination
(c) oxidation as well as combination
(d) reduction as well as displacement
In one method of rust prevention, the iron is not coated with anything. Which is this method?
Fill in the following blanks with suitable words:
............ and .............. are necessary for the rusting of iron.
Explain why, through aluminium is more reactive than iron, yet there is less corrosion of aluminium when both are exposed to air.
Name two metals which resist corrosion due to the formation of a thin, hard and impervious layer of oxide on their surface.
What is "rusting"? Describe with a labelled diagram an activity to investigate the conditions under which iron rusts.
Answer the following question.
List two properties of alloys.
Observe the following picture and answer the following questions:
- What is rust?
- Write the chemical formula of rust.
- Write the reaction of oxidation of iron at the anode.
- Write the reaction of oxidation of iron at the cathode.
- What is corrosion?
Which of the following method is used to prevent the accumulation of greenish layer on brass due to corrosion?
When one of the metals in an alloy is mercury the alloy is called _______.
Pressure cooker : Anodizing : : Silver plated spoons : _______
Find the odd one out and give its explanation.
Complete flow chart given below.
What is rust?
Write a molecular formula for rust.
Give the equation for the formation of rust.
Give an example of a chemical reaction for the following situation:
Sound is produced
