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प्रश्न
Sulphide ores : Roasting : : Carbonate ores : _______
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उत्तर
Sulphide ores : Roasting : : Carbonate ores : Calcination
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संबंधित प्रश्न
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Why do gold ornaments look new even after several years of use?
Name one metal which is extracted by:
Electrolytic reduction.
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 |
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.
Name the chemical compound which is electrolysed in molten state to obtain aluminium metal. Which gas is evolved during this process?
Name three other metals which are extracted in a manner similar to sodium.
The two metals which can be extracted just by heating their sulphides in air are ______.
Rock salt is an ore of one of the following metals. This metal is:
Zinc blende ore can be converted into zinc oxide by the process of ______.
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
How many valence electrons are present in non- metals?
Write the name.
The molecular formula of main ore of aluminium –
Gold and silver are active metals.
Explain the characteristics of ionic compounds.
Explain concept with example/explain with the help of a balanced equation.
Ionic bond and ionic compounds
Complete flow chart given below.
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.
