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प्रश्न
Give the chemical names and formulae of the main ores of zinc.
उत्तर
| Name | Chemical name | Formula |
| Calamine | Zinc carbonate | \[\ce{ZnCO3}\] |
| Zinc blende | Zinc sulphide | \[\ce{ZnS}\] |
| Zincite | Zinc oxide | \[\ce{ZnO}\] |
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संबंधित प्रश्न
Answer the following questions with respect to the electrolytic process in the extraction of aluminum:
Explain why powdered coke is sprinkled over the electrolytic mixture.
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.
- Write the formula of cryolite.
- Write down the word which correctly completes the following sentence.
By dissolving aluminium oxide in cryolite, a ______ (conducting/non-conducting) solution is produced. - Why is so much graphite required for the electrolytic process?
- Write the equation for the reaction which takes place at the cathode.
- What is cathode made up of?
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 ?
In the Hall's process for extraction of aluminium, Give the formula and purpose of fluorspar and cryolite
What is the role of cryolite (NaAlF6) in the electrolytic reduction of alumina in the Hall's process?
For the substance listed below, explain its role in the extraction of aluminium: Sodium hydroxide
The following question relate to the extraction of aluminium by electrolysis.
Name the other aluminium containing compound added to alumina and state the significance.
Name the alloy used for the following purpose.
Making medals
Write the balanced chemical equation to show the concentration of ore in Baeyer’s process.
Aluminium hydroxide to alumina
