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प्रश्न
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
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उत्तर
Extraction of aluminium:
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संबंधित प्रश्न
Name the following:
Main ore of aluminium.
Give reasons.
Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
Give a reasons for the following:
Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.
Name the most abundant metal in the earth’s crust.
How many carats is pure gold? Why is pure gold not suitable for making ornaments?
Name one metal which is extracted by:
Reduction with carbon.
The rocky material found with ores is called ______.
What is the difference between a mineral and an ore?
How is aluminium metal extracted? Explain with the help of an equation.
Which metal is extracted from calamine ore?
When an object made of metal A is kept in air for a considerable time, it loses its shine and becomes almost black due to the formation of a layer of substance B. When an object made of another metal C is kept in damp air for a considerable time, it gets covered with a green layer of substance D. Metal A is the best conductor of electricity whereas metal C is the next best conductor of electricity.
- What is metal А?
- What is metal C?
- Name the substance B.
- Name the substance D.
- What type of chemical can be used to remove the green layer from metal C and clean it? Why?
Give the chemical formula of :
Bauxite
How an ore is concentrated by froth floatation process?
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
How many valence electrons are present in non- metals?
X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ______.
(b) If X is a non-metal, then the litmus will turn ______.
(c) If X is a reactive metal, then ______ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form _ oxide, which will form ______ solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of ______.
To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.
Aluminium oxide is _______ oxide.
Explain the following reaction with the balanced equation.
Dry aluminium hydroxide is ignited at 1000 °C
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give a reason why Aluminium is preferably used in thermite reactions.
