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प्रश्न
A to F below relate to the source and extraction of either zinc or aluminium.
- Bauxite
- Coke
- Cryolite
- Froth floatation
- Sodium hydroxide solution
- Zinc blende
Write down the three letters each from the above list which are relevant to:
- Zinc
- Aluminium
उत्तर
- B, D and F.
- A, C and E.
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संबंधित प्रश्न
How is concentrated ore changed to oxide?
State the use of:
Mild steel,
Complete the statement using every given option.
During the extraction of aluminium..............
Chemical reaction of transformation of bauxite into alumina by Hall’s process.
Name the alloy of zinc used in simple voltaic cells.
What is added to steel to make it stainless steel?
Write the equation for the reaction of zinc of the following: Copper sulphate solution
| 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.
State the main components of the following alloy:
Brass
State the main components of the following alloy:
Bronze
choose the most appropriate term to match the given description.
Crushing of the ore into a fine powder
