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Question
Define and explain the meaning of the term ore.
Solution
Ore : Those minerals from which a metal can be extracted profitably are called ores. For example bauxite ore is used to extract aluminium metal, hematite ore is used to extract iron metal.
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RELATED QUESTIONS
State the main components of the following alloys:
Duralumin
Also give the names of their repective ores ?
How does aluminum react with the Air ?
Give the name and formula of the main orea of iron and zinc ?
Give reason for the following:
Galvanized metal ions should not be used for storing food.
Give composition and uses of the following alloys. Mention the reason for its use.
Brass
Complete and balance the following equation:
Al + N2 →
| 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.
The metals zinc and tin are present in the alloy
State the main components of the following alloy:
Duralumin
