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प्रश्न
Write the name.
The molecular formula of main ore of aluminium –
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उत्तर
The molecular formula of main ore of aluminium – Al2O3•nH2O
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संबंधित प्रश्न
The process by which sulphide ore is concentrated.
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
Why does aluminium not corrode right through?
A zinc ore on heating in air forms sulphur dioxide. Describe briefly any two stages involved in the conversion of this concentrated ore into zinc metal.
What is the difference between a mineral and an ore?
Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?
(a) Al2O3 + Fe
(b) MnO2 + Al
(c) Fe2O3 + Al
(d) Cu2O + Fe
Which metal can be extracted from the following ore?
Haematite
Give the chemical formula of :
Sodium aluminate
Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.
Name the following:
Name two metals always find in combined state.
Which method of refining is used to get 99.8% pure aluminium?
State the property of the metal being utilized in the following :
| Use of metal | Property |
| Zinc in Galvanization | |
| Aluminium in Thermite welding |
Usually ______ ores are subjected to ______ which is done in the absence of air.
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
Write the name.
The process of strong heating of carbonate ores in insufficient air–
Identify who I am!
Ore of Aluminum- ______
Read the following passage and answer the questions.
According to the reactivity series, zinc is more reactive than iron, iron is more reactive than silver. During study of this, a student dipped the iron nails in silver nitrate solution.
- What is reactivity series?
- What will happen when iron nails are dipped in silver nitrate solution?
- Which type of reaction happens when iron metal reacts with silver nitrate solution?
- What will happen if a zinc rod is used instead of iron nail?
Explain Bayer’s process of concentration of bauxite with a chemical equation.
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
