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प्रश्न
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
In the extraction of aluminium Write the function and chemical formula of cryolite
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उत्तर
Cryolite is added to the molten mixture of alumina to reduce the melting point. The formula of cryolite is Na3AlF6.
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संबंधित प्रश्न
How is copper extracted from its sulphide ore? Explain the various steps supported by chemical equations. Draw labelled diagram for the electrolytic refining of copper.
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
Which of the following metals are extracted by the electrolysis of their molten chlorides?
(a) Na and Hg
(b) Hg and Mg
(c) Na and Mg
(d) Cu and Fe
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(a) What are A and B?
(b) Identify C and D.
(c) What will be the action of C on litmus solution? Why?
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(b) What is metal C?
(c) Name the substance B.
(d) Name the substance D.
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
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Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
State the property of the metal being utilized in the following :
| Use of metal | Property |
| Zinc in Galvanization | |
| Aluminium in Thermite welding |
Name the following:
A steel grey coloured solid non-metal.
Iron is _______.
Find the odd one out and give its explanation.
In the electrolytic reduction of alumina, the lining of graphite acts as an anode.
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
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(b) Suggest a suitable electrolyte also.
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Care must be taken while diluting concentrated nitric acid with water. Why?
