CameraIcon

SearchIcon

MyQuestionIcon

1

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

Electrolysis and Electrolytes

Anodes need t...

Question

Anodes need to be replaced from time to time during the electrolysis of alumina. Give reason.

Open in App

Solution

In the electrolysis of alumina, graphite rod is used as the anode.

During the electrolytic reduction of alumina, aluminum is produced at the cathode and oxygen gas is evolved at the anode.

Oxygen reacts with the graphite rods (anode) and forms carbon dioxide.

Thus, the graphite rods are continuously eroded. Hence, the graphite rods or anodes need to be replaced from time to time during the electrolysis of alumina.

Suggest Corrections

thumbs-up

23

Similar questions

Q. Write scientific reasons.
a. Lemon or tamarind is used for cleaning copper vessels turned greenish.
b. Generally the ionic compounds have high melting points.
c. Sodium is always kept in kerosene.
d. Pine oil is used in froth flotation.
e. Anodes need to be replaced from time to time during the electrolysis of alumina.

Q. Give scientific reasons
Anodes need to be replaced from time to time during the electrolysis of alumina.

Q. [TBQ.V.(4)]
Write scientific reasons.
Anodes need to be replaced from time to time during the electrolysis of alumina.

Q. Explain the method of obtaining pure aluminum from alumina by electrolysis. In this process, the carbon rods are replaced from time to time. Why?

Q. Explain the method of obtaining pure aluminium from alumina by electrolysis . In this process , the carbon rods are replaced from time to time. Why ?

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Introduction to Electrolysis and Electrolytes

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Electrolysis and Electrolytes

Standard IX Chemistry

Join BYJU'S Learning Program

CrossIcon