MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Haber Bosch Process

Name the elem...

Question

Name the element which serves as the cathode in the extraction of aluminium.

A

Carbon

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

Graphite rods

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Iron

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

Aluminium

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Carbon
$A l_{2} O_{3} ⇌ 2 A l^{3 +} + 3 O^{2 -}$
At cathode : $2 A l^{3 +} + 6 e^{-} ⟶ 2 A l$
At anode : $3 O^{2 -} ⟶ 3 O_{2} + 6 e^{-}$
Electrolysis of Molten mixture
Cathode : Carbon
Anode : Graphite rods
Electrolyte : 60 parts cryolite + 20 parts fluorspar + 20 parts pure $A l_{2} O_{3}$
Temperature : 900 $^{o}$ C.

Suggest Corrections

thumbs-up

0

Similar questions

Q. The following is an extract from 'Metals in the service of man, Alexander and street / Pelican 1976' : Alumina (aluminium oxide) has a very high melting point of over 2000°C, so that it cannot readily be liquefied. However,conversion of alumina to aluminium and oxygen, by electrolysis, can occur when it is dissolved in some other substance.
(a) Which solution is used to react with bauxite as a first step in obtaining pure aluminium oxide?
(b) The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Write the equation for this reaction.
(c) Name the element which serves both as the anode and the cathode in the extraction of aluminium.
(d) Write the equation for the reaction that occurs at the cathode during the extraction of aluminium.
(e) Write the equation for the reaction that occurs at the cathode during the extraction of aluminium by electrolysis.
(f) Give the equation for the reaction that occurs at the anode when aluminium is purified by electrolysis.

Q. The following is an extract from 'Metals in the Service of Man, Alexander and Street/Pelican 1976':
'Alumina (Aluminium oxide) has a very high melting point of over 2000 C so that it cannot readily be liquefied. However, conversion of alumina to aluminium and oxygen, by electrolysis, can occur when it is dissolved in some other substance'.
(a) Which solution is used to react with bauxite as a first step in obtaining pure aluminium oxide?
(b) The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Write the balanced chemical equation for this reaction.
(c) Name the element which serves both as anode and the cathode in the extraction of aluminium.
(d) Write the balanced chemical equation for the reaction that occurs at the cathode during the extraction of aluminium by electrolysis.
(e) Give the balanced chemical equation for the reaction which occurs at the anode when aluminium is purified by electrolysis.

Q. In the extraction of aluminium:
(i) Name the process of concentration of bauxite
(ii) Write the cathode reaction in electrolytic reduction of alumina
(iii) write the function and formula of cryolite in the extraction of aluminium.
(iv) Draw the diagram of extraction of aluminium.

Q. The cathode used in the electrolytic cell during aluminium extraction is made of ____________.

Q. (i) Name the solution used to react with Bauxite as a first step in obtaining pure aluminium oxide, in the Baeyer's process.
(ii) Write the equation for the reaction where the aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide.
(iii) 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 aluminium 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.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Hydrides of Nitrogen - Ammonia and Hydrazine

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Haber Bosch Process

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon