Advertisements
Advertisements
प्रश्न
Give the chemical formula of :
Cryolite
उत्तर
Cryolite : Na2 AlF6
APPEARS IN
संबंधित प्रश्न
Give reasons.
Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
Name one metal which is extracted by reduction with carbon.
Fill in the following blank with suitable word:
Bronze is an alloy of copper and .........
Name two metals which occur in nature in free state as well as in combined state.
Which of the following is an ore of mercury metal?
(a) rock salt
(b) cinnabar
(c) calamine
(d) haematite
Which metal can be extracted from the following ore?
Calamine
Aluminum is used in thermite welding:
what is ignition mixture?
Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.