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प्रश्न
Zinc sulphide : Roasting : : zinc carbonate : _______
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उत्तर
Zinc sulphide : Roasting : : zinc carbonate : calcination
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संबंधित प्रश्न
How is manganese extracted from manganese dioxide, MnO2? Explain with the help of an equation.
Name the method by which aluminium metal is extracted.
Name two metals which occur in nature in free state as well as in combined state.
Define the term mineral.
Name two metals which are always found in combined state.
Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?
Which metal is extracted from bauxite ore?
The major ore of aluminium is known as ______.
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
Give the chemical formula of :
Bauxite
Give the chemical formula of :
Cryolite
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Name the electrode, from which aluminium collected.
The following questions relate to the extraction of aluminium by electrolysis.
Explain why it is necessary to renew the anode periodically.
X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ______.
(b) If X is a non-metal, then the litmus will turn ______.
(c) If X is a reactive metal, then ______ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form _ oxide, which will form ______ solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of ______.
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
Define roasting.
Aluminium oxide is _______ oxide.
Write the molecular formulae of the following compound.
Cryolite
Explain the following reaction with the balanced equation.
Chlorine dissolved in water
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give a reason why Aluminium is preferably used in thermite reactions.
