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प्रश्न
Name the following:
Main ore of aluminium.
Name the ore for aluminium.
Give one word for the following:
An ore of aluminium.
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उत्तर
Bauxite (Al2O3.nH2O) is the main ore of aluminium.
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संबंधित प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
Define the Ore.
Name two metals which are found in nature in the free state.
The non-metal present in steel is ______.
Which one of the methods given in column I is applied for the extraction of each of the metals given in column II:
| Column I | Column II |
| Electrolytic reduction | Aluminium |
| Reduction with Carbon | Zinc |
| Reduction with Aluminium | Sodium |
| Iron | |
| Manganese | |
| Tin |
Explain giving equation, what happens when:
A mixture of Cu2O and Cu2S is heated.
Explain why, an aqueous solution of sodium chloride is not used for the electrolytic extraction of sodium metal.
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
Which metal is extracted from calamine ore?
Which of the following pair of metals exists in their native state in nature?
Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?
The metal which is always present in an amalgam is ______.
Manganese metal is extracted from manganese dioxide by a reduction process by making use of ______.
The metal which can be extracted from pyrolusite ore is ______.
Zinc blende ore can be converted into zinc oxide by the process of ______.
Give the principles of the hydrolytic method.
Give reasons, why aluminum is used in:
wrapping chocolates
Give reasons, why aluminum is used in:
In aluminiothermy
Define the following term.
Mineral
Give the chemical formula of :
Bauxite
How an ore is concentrated by froth floatation process?
Explain the following:
Galvanization protects iron from rusting.
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
Name : The metal which is liquid at room temperature.
Name:
The allotrope of the non-metal carbon which conducts electricity.
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Which one of the following is not true of metal :
Metals are malleable and ductile
Froth floatation process is generally used to concentrate ______ ores.
In electrolytic reduction of alumina _______ is used as a cathode.
Write the name.
The molecular formula of main ore of aluminium -
Write the name.
Metals which are amphoteric in nature.
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Explain concept with example/explain with the help of a balanced equation.
Calcination
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
- Given below are the steps for extraction of copper from its ore. Write the reaction involved.
- Roasting of copper (I) sulphide
- Reduction of copper (I) oxide with copper (I) sulphide.
- Electrolytic refining
- Draw a neat and well labelled diagram for electrolytic refining of copper
