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प्रश्न
The electrolysis of alumina involves the use of fluorspar and cryolite to increase the melting point.
विकल्प
Right
Wrong
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उत्तर
The electrolysis of alumina involves the use of fluorspar and cryolite to increase the melting point- Wrong
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संबंधित प्रश्न
The process by which sulphide ore is concentrated.
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
Name the metal which is extracted from the ore called ‘rock salt’.
Which metal is extracted from calamine ore?
The articles made of silver metal become dark on prolonged exposure to air. This is due to the formation of a layer of its ______.
Which metal can be extracted from the following ore?
Calamine
Give reasons, why aluminum is used in:
making alloys
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 substance added to get rid of gangue in the extraction of metal.
What is meant by concentration of ores?
Compare the process of calcination and roasting.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Which one of the following is not true of metal :
Metals are malleable and ductile
Choose the correct answer from the options given below:
The metal is a liquid at room temperature.
Gold and silver are active metals.
Identify who I am!
Ore of Aluminum- ______
Explain Bayer’s process of concentration of bauxite with a chemical equation.
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
