हिंदी

Sulphide ores : Roasting : : Carbonate ores : _______

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प्रश्न

Sulphide ores : Roasting : : Carbonate ores : _______

रिक्त स्थान भरें
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उत्तर

Sulphide ores : Roasting : : Carbonate ores : Calcination

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Metallugy - Find the correlation.

संबंधित प्रश्न

In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?


In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.


How many carats is pure gold? Why is pure gold not suitable for making ornaments?


Fill in the following blank with suitable word:

 The non-metal present in steel is ............


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.


How are the less reactive metals (which are quite low in the reactivity series) extracted? Explain with the help of an example.


Name one ore of copper (other than cuprite). Which compound of copper is present in this ore? Also, write its chemical formula.


Explain given equation, what happens when ZnCO3 is heated in the absence of air?


Name the metal which is extracted from haematite ore.


Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?


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(a) chromium
(b) tin
(c) zinc
(d) copper


Give the principles of electromagnetic separation.


Aluminum is used in thermite welding:

write reaction for process?


Identify the process given in following passage and draw neat labelled diagram showing the process.
          Electrolysis of molten mixture of alumina (melting point > 20000C) is done in a steel tank. The tank has a graphite lining on the inner side. This lining does the work of a cathode. A set of graphite rods dipped in the molten electrolyte works as anode. Cryolite (Na3AlF6) and fluorspar (CaF2) are added in the mixture to lower its melting point upto 10000C.

 


Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.


Name a non- metal that has a metallic luster and sublimes on heating.


Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.


choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature


Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.


Explain the characteristics of ionic compounds.


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