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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 the formula of cryolite.
उत्तर
\[\ce{Na3AlF6}\]
APPEARS IN
संबंधित प्रश्न
Name the following:
An ore of zinc containing its sulphide.
Identify the term/substance in the following:
The method used to separate ore from gangue by preferential wetting
What is rust? Give the equation for the formation of rust ?
How is concentrated ore changed to oxide?
Complete the statement using every given option.
During the extraction of aluminium..............
Use of leaching during the concentration of ore.
Name the following:
The chief metal present in magnalium and duralumin
Write the name and formula of two ores of the following: Aluminium
Complete and balance the following equation:
Al + KOH + H2O →
| 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.
Bauxite : Aluminium ore : : Cassiterite : _______
