Single Choice

During extraction of aluminium from bauxite:

Athe concentration of ore is done by gravity separation method
Bmolten mixture of aluminium oxide, cryolite or fluorspar is electrolysed
Correct Answer
Cimpure aluminium is defined by liquation
Dmolten aluminium is obtained at cathode while fluorine is liberated at anode

Solution

Cryolite and Flourspar are added to decrease melting point and increase conductivity of ore. So they are added to Bauxite for better extraction of Aluminium.

SIMILAR QUESTIONS

Metals and Non - metals

In metallurgical process, aluminium acts as:

Metals and Non - metals

Which of the following metals cannot be obtained by reduction of its metal oxide by aluminium?

Metals and Non - metals

Which of the following metals is obtained by electrolytic reduction process?

Metals and Non - metals

Answer the following: (a) Aluminium is a more active metal than iron, but suffers less corrosion. Why? (b) Explain and give reasons why aluminium vessels should not be cleaned with powders containing alkalis.

Metals and Non - metals

Why the food containing iron salts should not be cooked in aluminium utensils?

Metals and Non - metals

State on what special properties the use of each of these metals depends: (a) aluminium (b) zinc

Metals and Non - metals

How can a layer off aluminium oxide on an aluminium object be made thicker? What is this process called?

Metals and Non - metals

Aluminium reacts with caustic soda to form :

Metals and Non - metals

Aluminum has a great affinity for oxygen and its oxidation is an exothermic process. This fact is made use of in

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