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प्रश्न
Identify the process given in following passage and draw neat labelled diagram showing the process.
Electrolysis of molten mixture of alumina (melting point > 20000C) is done in a steel tank. The tank has a graphite lining on the inner side. This lining does the work of a cathode. A set of graphite rods dipped in the molten electrolyte works as anode. Cryolite (Na3AlF6) and fluorspar (CaF2) are added in the mixture to lower its melting point upto 10000C.
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उत्तर
Electrolytic reduction of Alumina :
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संबंधित प्रश्न
Define the Ore.
Name the following:
The property possessed by metals by which they can be beaten into sheets.
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
Why do gold ornaments look new even after several years of use?
Name one metal which is extracted by:
Reduction with heat alone.
How is zinc extracted from its carbonate ore (calamine)? Explain with equations.
Explain giving equation, what happens when:
ZnCO3 is heated in the absence of air?
A sulphide ore is converted into metal oxide by the process of ______.
Which metal can be extracted from the following ore?
bauxite
State three objectives achieved during the roasting of ores.
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Name the electrode, from which aluminium collected.
Name the following:
Two metals which are found in the free or native state.
Answer the following question :
What is the difference between calcination and roasting.
choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature
Find the odd one out and give its explanation.
Identify who I am!
Ore of Aluminum- ______
Explain the characteristics of ionic compounds.
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
- Given below are the steps for extraction of copper from its ore. Write the reaction involved.
- Roasting of copper (I) sulphide
- Reduction of copper (I) oxide with copper (I) sulphide.
- Electrolytic refining
- Draw a neat and well labelled diagram for electrolytic refining of copper
