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प्रश्न
Write the name.
The process of strong heating of carbonate ores in insufficient air–
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उत्तर
The process of strong heating of carbonate ores in insufficient air– Calcination
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संबंधित प्रश्न
Define the Ore.
Which of the following pairs will give displacement reactions?
Give a reason for the following:
Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.
How many carats is pure gold? Why is pure gold not suitable for making ornaments?
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Which one of the methods given in column I is applied for the extraction of each of the metals given in column II:
| Column I | Column II |
| Electrolytic reduction | Aluminium |
| Reduction with Carbon | Zinc |
| Reduction with Aluminium | Sodium |
| Iron | |
| Manganese | |
| Tin |
Define the term ore.
What is meant by the 'concentration of ore'?
During galvanisation, iron metal is given a thin coating of one of the following metals. This metal is:
(a) chromium
(b) tin
(c) zinc
(d) copper
Zinc blende ore can be converted into zinc oxide by the process of:
(a) roasting
(b) hydrogenation
(c) chlorination
(d) calcination
Which metal can be extracted from the following ore?
Calamine
Give the chemical formula of :
Sodium aluminate
Define the term:
Slag
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature
Aluminium oxide is _______ oxide.
Explain Bayer’s process.
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
Electrical wires have a coating of an insulting material. The material, generally used is
