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Explain with reason: A neutral gas other than oxygen is formed at the anode during the electrolysis of fused alumina. - Chemistry

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प्रश्न

Explain with reason:

A neutral gas other than oxygen is formed at the anode during the electrolysis of fused alumina.

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उत्तर

An anode is made of carbon, which gets oxidised in the presence of oxygen to form carbon monoxide, which is a neutral gas.

\[\ce{2C + O2 -> 2CO}\]

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अध्याय 7: Metallurgy - Exercise 7C [पृष्ठ १३३]

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सेलिना Concise Chemistry [English] Class 10 ICSE
अध्याय 7 Metallurgy
Exercise 7C | Q 6.6 | पृष्ठ १३३

संबंधित प्रश्न

Write the equation for the reaction that occurs at the cathode during the extraction of aluminum by electrolysis.


Name the process by which the refining of aluminium is done ?


Name the constituents of Brass.


For cryolite, explain its significance in the extraction of aluminium.


In order to obtain 1 tonne of aluminium, the following inputs are required: 4 tonnes of bauxite, 150 kg of sodium hydroxide and 600 kg of graphite. The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (III) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.

When bauxite is treated with sodium hydroxide solution, what happens to:

  1. the aluminium oxide,
  2. the iron (III) oxide?

In order to obtain 1 tonne of aluminium, the following inputs are required: 4 tonnes of bauxite, 150 kg of sodium hydroxide and 600 kg of graphite. The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (III) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.

  1. Name the process used for the purification of bauxite.
  2. Write the equation for the action of heat on aluminium hydroxide.

Give reason for the following:
Aluminium oxide cannot be reduced by carbon.


For the substance listed below, explain its role in the extraction of aluminium: Graphite


During the concentration of bauxite ore, aluminium goes in ______ part because of its ______ nature.


Name the following:

A metal which is always present in the amalgam.


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