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प्रश्न
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
उत्तर
At anode: \[\ce{2O^{2-} -> O2 + 4e-}\]
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संबंधित प्रश्न
Fill in the following blank with suitable word:
Bronze is an alloy of copper and .........
Fill in the following blank with suitable word:
The rocky material found with ores is called.............
Give the name of one ore of iron. Which iron compound is present in this ore? Write its chemical formula.
Which metal is extracted from calamine ore?
Which of the following is an iron ore?
(a) cinnabar
(b) calamine
(c) haematite
(d) rock salt
Which of the following is an ore of mercury metal?
(a) rock salt
(b) cinnabar
(c) calamine
(d) haematite
Which metal can be extracted from the following ore?
Calamine
Give reasons, why aluminum is used in:
wrapping chocolates
Give reasons, why aluminum is used in:
In making ships
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
Name:
The allotrope of the non-metal carbon which conducts electricity.
Which one of the following is not true of metal :
Metals are good conductors of electricity.
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Explain the concept of Roasting.
Explain the concept of Calcination.
Explain the following reaction with the balanced equation.
Dry aluminium hydroxide is ignited at 1000 °C
Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper, etc. are reduced by using:
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
Assertion (A): The extraction of metals from their sulphide ores cannot take place without roasting the ore.
Reason (R): Roasting converts sulphide ores directly into metals.
