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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
What chemical process is used for obtaining a metal from its oxide?
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
Name one metal which is extracted by reduction with carbon.
Name one metal which is extracted by reduction with heat alone.
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 |
How is zinc extracted from its carbonate or (calamine)? Explain with equations.
Explain givem equation, what happens when a mixture of Cu2O and Cu2S is heated?
Name the gas evolved when cinnabar ore is roasted.
Explain how, mercury is extracted from its sulphide ore (cinnabar). Give equations of the reactions involved.
Which of the following is an iron ore?
(a) cinnabar
(b) calamine
(c) haematite
(d) rock salt
The two metals which can be extracted just by heating their sulphides in air are:
(a) sodium and copper
(b) copper and aluminium
(c) potassium and zinc
(d) mercury and copper
An important ore of zinc metal is:
(a) calamine
(b) cuprite
(c) pyrolusite
(d) haematite
Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?
(a) Al2O3 + Fe
(b) MnO2 + Al
(c) Fe2O3 + Al
(d) Cu2O + Fe
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
Give reasons, why aluminum is used in:
In aluminiothermy
State one observation for each of the following :
Copper sulphate solution is electrolysed using copper electrodes.
Complete the incomplete statement with missing words:
Metals are ______ while non-metals are ______ conductors of heat.
In Electrolytic reduction of alumina, Anode : _______ : : Cathode : Graphite lining
Zinc sulphide : Roasting : : zinc carbonate : _______
Explain in brief types of extraction of less reactive metals according to their reactivity.
