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प्रश्न
Write the name.
The process of strong heating of carbonate ores in insufficient air–
उत्तर
The process of strong heating of carbonate ores in insufficient air– Calcination
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संबंधित प्रश्न
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Explain why, carbon cannot reduce oxides of sodium or magnesium.
Name one metal which is extracted by reduction with aluminium.
A zinc ore on heating in air forms sulphur dioxide. Describe briefly any two stages involved in the conversion of this concentrated ore into zinc metal.
Define the term mineral.
How is sodium metal extracted? Explain with the help of equation of the reaction involved.
Which metal is extracted from calamine ore?
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Define the following term.
Mineral
Give the chemical formula of :
Bauxite
Give the chemical formula of :
Sodium aluminate
Define the term : Flux
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
Define calcination.
Usually ______ ores are subjected to ______ which is done in the absence of air.
Zinc sulphide : Roasting : : zinc carbonate : _______
Gold and silver are active metals.
Explain in brief types of extraction of moderately reactive metals according to their reactivity.
An alloy is
