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प्रश्न
Zinc sulphide : Roasting : : zinc carbonate : _______
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उत्तर
Zinc sulphide : Roasting : : zinc carbonate : calcination
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संबंधित प्रश्न
Define the Ore.
Give reasons.
Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
The non-metal present in steel is ______.
Explain giving equation, what happens when:
ZnCO3 is heated in the absence of air?
Explain giving equation, what happens when:
A mixture of Cu2O and Cu2S is heated.
Name the chemical compound which is electrolysed in molten state to obtain sodium metal. Which gas is produced in this process?
Name the gas evolved when cinnabar ore is roasted.
Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae.
The two metals which are extracted by means of electrolytic reduction of their molten salts are ______.
Aluminum is used in thermite welding:
what is thermit?
Name the following:
The mixture of materials fed into a furnace to extract a metal.
Name the following:
The substance added to get rid of gangue in the extraction of metal.
What is galvanized iron.
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Explain concept with example/explain with the help of a balanced equation.
Roasting
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.
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
