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प्रश्न
Name the following:
The middle region of the blast furnace.
उत्तर
Zone of heat absorption
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संबंधित प्रश्न
For the substance given below, describe the role played in the extraction of aluminium.
Cryolite
The reason for using Aluminium in the alloy duralumin is ______.
Give reason for the following:
Extraction of aluminium was very difficult in the beginning.
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
Fill in the blanks using the most appropriate words from A to F:
(i) The ore from which aluminium is extracted must be treated with ______ so that pure aluminium oxide can be obtained.
(ii) Pure aluminium oxide is dissolved in ______ to make a conducting solution.
Correct the following statement :
Haematite is the chief ore of aluminium.
Explain why :
Iron sheets are coated with zinc during galvanization.
Name the following:
A metal which is always present in the amalgam.
Name the alloy used for the following purpose.
Surgical instruments
Write the balanced chemical equation to show the concentration of ore in Baeyer’s process.
Sodium aluminate to aluminium hydroxide
In Hall and Heroult's process, products liberated at anode and cathode are ______
