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प्रश्न
Bauxite reacts with sodium hydroxide in the Bayer’s process.
विकल्प
Right
Wrong
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उत्तर
Bauxite reacts with sodium hydroxide in the Bayer’s process- Right
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संबंधित प्रश्न
In the electrolytic refining of a metal M, what would you take as anode, cathode and electrolyte?
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
In the extraction of aluminium: Why is it necessary to replace anodes time to time?
Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
Define the term ore.
Explain giving equation, what happens when:
ZnCO3 is heated in the absence of air?
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
An ore of manganese metal is ______.
Which of the following pair of metals exists in their native state in nature?
Which of the following metals can be obtained from haematite ore?
The metal which can be extracted from pyrolusite ore is ______.
An element A which is a part of common salt and kept under kerosene reacts with another element B of atomic number 17 to give a product C. When an aqueous solution of product C is electrolysed then a compound D is formed and two gases are liberated.
- What are A and B?
- Identify C and D.
- What will be the action of C on litmus solution? Why?
- State whether element B is a solid, liquid or gas at room temperature.
- Write formula of the compound formed when element B reacts with an element E having atomic number 5.
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Compare the process of calcination and roasting.
How are metals refined by the electrolytic methods?
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
Usually ______ ores are subjected to ______ which is done in the absence of air.
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
_______ is the least reactive metal.
Explain the following reaction with the balanced equation.
Chlorine dissolved in water
