Advertisements
Advertisements
प्रश्न
The metal which can be extracted from pyrolusite ore is:
(a) mercury
(b) manganese
(c) aluminium
(d) magnesium
उत्तर
(b) manganese
Manganese is extracted from its oxide ore, pyrolusite. The name of the compound in the ore is manganese dioxide having chemical formula MnO2.
APPEARS IN
संबंधित प्रश्न
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
Why does a new aluminium vessel lose shine so soon after use?
Which metal is extracted from calamine ore?
Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?
Name the following:
Name two metals always find in combined state.
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 good conductors of electricity.
Choose the correct answer from the options given below:
The metal is a liquid at room temperature.
Iron is _______.
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
