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प्रश्न
Explain the concept of Roasting.
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उत्तर
In roasting process, the sulphide ores are strongly heated in air to transform them into oxides. In this process, sulphide ores are oxidized to form metal oxides and sulphur dioxide gas.
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संबंधित प्रश्न
Give reasons.
Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
Name the most abundant metal in the earth’s crust.
Name one metal which is extracted by:
Reduction with aluminium.
Define the term mineral.
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
Name the electrode at which aluminium metal is produced.
Which of the following is an iron ore?
Which of the following metals can be obtained from haematite ore?
Which metal can be extracted from the following ore?
Haematite
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
What is the function of cryolite used along with alumina as the electrolyte?
Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.
Name the following:
Name two metals always find in combined state.
How an ore is concentrated by froth floatation process?
Name a non- metal that has a metallic luster and sublimes on heating.
In electrolytic reduction of alumina _______ is used as a cathode.
Explain concept with example/explain with the help of a balanced equation.
Ionic bond and ionic compounds
Complete flow chart given below.
Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. Write chemical equations for both the reactions.
