Question

iii. Copper, a metal, con
Chemistry-2016 | 697
er a metal, conducts electricity even in solid state. It is due to the presence of
mobile electrons in it. The electrical conduction in copper metal is not due to
as ionic solids do not conduct electricity in solid state. Hence copper is a non-
electrolyte.
Question 7.
Name the solution used to react with Bauxite as a first step in obtaining pure
aluminum oxide, in the Baeyer's process.
Write the equation for the reaction where the aluminum oxide for the electrolytic
extraction of aluminum is obtained by heating aluminum hydroxide.
ii. Name the compound added to pure alumina to lower the fusion temperature during
the electrolytic reduction of alumina.
iv. Write the equation for the reaction that occurs at the cathode during the extraction of
aluminum by electrolysis.
v. Explain why it is preferable to use a number of graphite electrodes as anode instead of
a single electrode, during the above electrolysis.

pls guve ans for the fifth part ...​

Answer 1

Answer:

During the electrolysis process, aluminium is deposited at the cathode and oxygen is liberated at the anode. Some of the oxygen reacts with the carbon in the graphite to form carbon dioxide. ... Thus, the anodes have to be replaced periodically or a number of graphite electrode as anodes have to be used