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प्रश्न
Write the molecular formulae of the following compound.
Fluorspar
उत्तर
Fluorspar- CaF2
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संबंधित प्रश्न
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
Give the name and chemical formula of one ore of copper.
Define the terms gangue.
Name the chemical compound which is electrolysed in molten state to obtain sodium metal. Which gas is produced in this process?
Which metal is extracted from bauxite ore?
Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula.
An ore of manganese metal is:
(a) bauxite
(b) haematite
(c) cuprite
(d) pyrolusite
During galvanisation, iron metal is given a thin coating of one of the following metals. This metal is:
(a) chromium
(b) tin
(c) zinc
(d) copper
Give reasons, why aluminum is used in:
making alloys
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Why is powdered coke sprinkled on top of the electrolyte?
Name the following:
The substance added to get rid of gangue in the extraction of metal.
Arrange the metals of copper, iron, magnesium, sodium and zinc in the decreasing order of reactivity.
State the property of the metal being utilized in the following :
| Use of metal | Property |
| Zinc in Galvanization | |
| Aluminium in Thermite welding |
Which one of the following is not true of metal :
Metals form non-polar covalent compounds
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
Sulphide ores : Roasting : : Carbonate ores : _______
Write the name.
The molecular formula of main ore of aluminium –
Write the molecular formulae of the following compound.
Cryolite
Explain concept with example/explain with the help of a balanced equation.
Roasting
