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प्रश्न
What is an alloy?
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उत्तर
An alloy is a homogeneous mixture of two or more metals or of one or more metals with certain non-metallic elements.
संबंधित प्रश्न
Give two examples of alloys with their chemical composition.
Explain the term corrosion.
Which of the following methods is suitable for preventing an iron frying pan from rusting?
What special name is given to the corrosion of iron?
Name the metal which is used for galvanising iron.
What is corrosion?
A common metal which is highly resistant to corrosion is ______.
No chemical reaction takes place when granules of a rusty-brown 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.
- What could the solids A and B be?
- What are the products C and D most likely to be?
- Write the chemical equation for the reaction between A and B leading to the formation of C and D. Mention the physical states of all the reactants and products in this equation and indicate the heat change which takes place.
- What is the special name of such a reaction? State one use of such a reaction.
- Name any two types of chemical reactions under which the above reaction can be classified.
Explain how the activity series accounts for each of the following:
tendency to corrosion
What are the adverse effects of corrosion?
Choose the correct alternative and rewrite the following:
Iron is _____________________.
Which of the following method is used to prevent the accumulation of greenish layer on brass due to corrosion?
Find the correlation:
Bronze : ______ :: Tin : Cu+Zn.
Write the name.
An alloy of copper and tin-
Complete flow chart given below.
What is rust?
Copper objects lose their shine and form green coating of ____________.
Galvanisation is a process used to prevent the rusting of which of the following?
Gold plated ornaments is the example of ______.
Explain the chemical reactions in rusting of iron.
