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प्रश्न
Explain the concept of Calcination.
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उत्तर
In the calcination process, carbonate ores are strongly heated in a limited supply of air to transform them into oxides. In this process, carbonate ores decompose to form a metal oxide and carbon dioxide gas.
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संबंधित प्रश्न
Give a reasons for the following:
Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.
Manganese metal is extracted from manganese dioxide by a reduction process by making use of ______.
Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.
How an ore is concentrated by froth floatation process?
Compare the process of calcination and roasting.
Compare the properties of a typical metal and a non- metal on the basis of the following:
(a) electronic configuration
(b) nature of oxides
(c) oxidizing or reducing action
(d) conductivity of heat and electricity
Name the following:
The process of heating an ore to a high temperature in the presence of air.
Which one of the following is not true of metal :
Metals are malleable and ductile
Answer the following question :
What is the difference between calcination and roasting.
Define roasting.
Zinc blende is converted to oxide by ______ process.
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
Extraction of moderately reactive elements is done by _______ and _______ method.
Write the name.
The process of extraction of aluminium from alumina-
Write the molecular formulae of the following compound.
Fluorspar
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
Which of the statements about the reaction, \[\ce{ZnO + CO -> Zn + CO2}\] is correct?
An alloy is
Electrical wires have a coating of an insulting material. The material, generally used is
