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प्रश्न
State the main components of the following alloys:
Duralumin
उत्तर
Main components of duralumin are aluminum, magnesium, copper, and manganese.
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संबंधित प्रश्न
Select the process from the following which matches the given description.
(calcination, roasting, pulverisation, smelting)
Crushing of the ore into a fine powder.
Name the process by which impure ore of aluminium gets purified by using the concentrated solution of an alkali.
Write the equation for the formation of aluminium at the cathode during the electrolysis of alumina.
How does the painting of an iron object prevent rusting?
What is red mud, how is it removed?
Give reason for the following:
Zinc is used in galvanization and dry cells.
Give composition and uses of the following alloys. Mention the reason for its use.
Stainless steel
Give composition and uses of the following alloys. Mention the reason for its use.
Solder
| X | Y | |
| Normal Electronic Configuration | 2, 8, 7 | 2, 8, 2 |
| Nature of Oxide | Dissolves in water and truns blue litmus red. | Very low solubility in water. Dissolves in hydrochloric acid. |
| Tendency for Oxidising and reducing reactions | Tends to oxidise elements and compound. | Tends to act as a reducing agent. |
| Electrical and Thermal Conductivity | Very poor electrical conductor. Poor thermal conductivity. |
Good electrical conductor. Good thermal conductor. |
| Tendency to form Alloys and Amalgams | No tendency to form alloys. | Forms alloys. |
Using the information above, complete the following:
- _________ is the metallic element.
- Metal atoms tend to have a maximum of ________ electrons in the outermost energy level.
- Non-metallic elements tend to form _________ oxides while metals tend to form _______ oxides.
- Non-metallic elements tend to be ______ conductors of heat and electricity.
- Metals tend to _______ electrons and act as ________ agents in their reactions with elements and compounds.
In the Wilfley table method, the particles of gangue are separated by __________ separation method.
