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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
A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula.
Write the composition of the alloy called bronze.
How is aluminium metal extracted? Explain with the help of an equation.
Which metal is extracted from bauxite ore?
Which metal is extracted from calamine ore?
The two metals which can be extracted just by heating their sulphides in air are ______.
The two metals which are extracted by means of electrolytic reduction of their molten salts are ______.
Which of the following metals are extracted by the electrolysis of their molten chlorides?
Give the principles of electromagnetic separation.
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Name the electrode, from which aluminium collected.
Compare the process of calcination and roasting.
How many valence electrons are present in metals ?
Calcium, copper, lead, aluminium, zinc, chromium, magnesium, iron.
Choose the major metals from the list given above to make the following alloys:
(a) Stainless steel
(b) brass
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 ______.
Zinc blende is converted to oxide by ______ process.
What is the difference between calcination and roasting?
Carbon cannot reduce the oxides of sodium, magnesium, and aluminum to their respective metals. Why? Where are these metals placed in the reactivity series? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.
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.
Which of the following ore is concentrated by the Froth floatation process?
