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प्रश्न
Name the following:
The process of heating an ore to a high temperature in the presence of air.
उत्तर
Roasting
APPEARS IN
संबंधित प्रश्न
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Define the term ore.
Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula.
The metal which is always present in an amalgam is:
(a) iron
(b) aluminium
(c) mercury
(d) magnesium
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Zinc sulphide : Roasting : : zinc carbonate : _______
Write the molecular formulae of the following compound.
Sodium aluminate
Explain the reactions of nonmetals with water with the help of examples.
Observe the figure and answer the following.
- Write the name of the method.
- What is used as anode and cathode in this method?
- Write the molecular formula and use of cryolite.
- Write anode reaction.
- Write cathode reaction.
