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Bauxite and Its Distribution in Karnataka

Bauxite ore l...

Question

Bauxite ore located in Belgavi is used to make aluminium for which of the following company?

A

Aluminium Production Company of India

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B

Indian Aluminium Company

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C

Bharat Aluminium Company

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D

National Aluminium Company

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Solution

The correct option is B Indian Aluminium Company
Bauxite ore is heavily used in the Indian Aluminium Company factory located at Belgavi.

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Q. Bauxite ore located in Belgavi is used to make aluminium for which of the following company?

Q. Arrange to indicate the process of production of aluminium from bauxite.

Note: A - Aluminium B - Bauxite Q - Quarry R - Refinery

Q. Bauxite is an ore of aluminium.

Q. In order to obtain one 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.
(a) When bauxite is treated with sodium hydroxide solution, what happens to:
(i) the aluminium oxide?
(ii) the iron (III) oxide?
(b) (i) Name the process used for the purification of bauxite.
(ii) Write the equation to show the action of heat on aluminium hydroxide.
(c) (i) Write the formula of cryolite.
(ii) Write down the word which correctly completes the following sentence:
"By dissolving aluminium oxide in cryolite, a __________ (conducting/non-conducting) solution is produced.
(iii) Why is so much graphite required for this electrolytic process?
(iv) Write the equation for the reaction which takes place at the cathode.
(d) In construction work, why is the alloy of aluminium, duralumin used rather than pure aluminium.

Q. Which of the following technique is used in the manufacture of aluminium from bauxite?

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