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प्रश्न
Give composition and uses of the following alloys. Mention the reason for its use.
Solder
उत्तर
| Alloys | Composition | Uses |
| Solder | Pb = 50% Sn = 50% |
|
APPEARS IN
संबंधित प्रश्न
State on what special properties the use of each of these metals depends:
aluminium
Explain
A neutral gas other than oxygen which is formed at the anode during electrolysis of fused alumina
State the use of:
cast iron
Write the name and formula of two ores of the following: Iron
What is an amalgam? Name one metal which does not form amalgam? State one use of amalgam.
Explain the following:
Cold water has no action on aluminium.
The following question refer to the extraction of aluminium and iron from their ores:
What is the most important chemical process in the extraction of any metal? State how this essential step is carried out in the extraction of: i. iron, and ii. Aluminium.
Name the main constituent metal in the following alloy:
Brass
| 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.
Name the following :
An ore of zinc containing its sulphide.
