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प्रश्न
Both brass and bronze contain copper as major constituents. Name other elements in these alloys.
उत्तर
- The other element in Brass is Zinc.
- The other elements in Bronze are Tin and Zinc.
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संबंधित प्रश्न
Explain why In the electrolysis of alumina using the Hall Heroult's Process the electrolyte is covered with powdered coke
In order to obtain 1 tonne of aluminium, the following inputs are required: 4 tonnes of bauxite, 150 kg of sodium hydroxide and 600 kg of graphite. The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (III) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
When bauxite is treated with sodium hydroxide solution, what happens to:
- the aluminium oxide,
- the iron (III) oxide?
In order to obtain 1 tonne of aluminium, the following inputs are required: 4 tonnes of bauxite, 150 kg of sodium hydroxide and 600 kg of graphite. The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (III) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
- Name the process used for the purification of bauxite.
- Write the equation for the action of heat on aluminium hydroxide.
How is ore purified (give equations also)
An aqueous solution of sodium chloride is not used for electrolytic reduction of sodium metal. Why?
Aluminium is extracted from its chief ore bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction.
Name a chemicals used for dissolving aluminium oxide. In which state of sub-division is the chemical used?
Aluminium is extracted from its chief ore bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction.
Mention one reason for the use of aluminium in thermite welding. Which particular property of cast iron makes it unsuitable for the construction of bridges?
Write the equation for the reaction that occurs at the cathode during the extraction by aluminium by electrolysis.
Name the following :
The compound formed by the reaction between calcium oxide and silica.
State the relevant reason for the following:
A layer of powered coke is used over the electrolytic mixture in Hall Heroult’s process.
