The ore of Aluminium is a) Bauxiteb) Chromiumc) Micad) ManganeseCorrect answer is option 'A'. Can you explain this answer?

Question

The ore of Aluminium is       a) Bauxiteb) Chromiumc) Micad) ManganeseCorrect answer is option 'A'. Can you explain this answer?

Answer

Bauxite, an aluminium ore, is the world’s main source of aluminium. It consists mostly of the minerals gibbsite.

Answer

A

Answer

Al2O3. xH2O is the formula of bauxite and it is the ore of Aluminium, and all other options are not ore of Al

Answer

Bauxite

Answer

The ore of Aluminium is Bauxite

Explanation:
Bauxite is the primary ore of aluminium, which means it is the main source from which aluminium is extracted. It is a mixture of various minerals, including gibbsite, boehmite, and diaspore, along with iron oxides and clay minerals.

Composition of Bauxite:
Bauxite typically contains about 40-60% aluminium oxide (Al2O3), along with other elements such as silicon dioxide (SiO2), iron oxide (Fe2O3), titanium dioxide (TiO2), and small amounts of other impurities like manganese, calcium, and magnesium.

Formation of Bauxite:
Bauxite is formed through the weathering of aluminium-rich rocks under tropical conditions. The process involves the leaching of silica and other soluble materials, leaving behind a residue rich in aluminium oxide. Over millions of years, this residue gets compacted and cemented to form the rock-like substance known as bauxite.

Extraction of Aluminium from Bauxite:
The extraction of aluminium from bauxite involves several steps, including mining, crushing, grinding, digestion, precipitation, and calcination.

1. Mining: Bauxite deposits are usually found near the surface, so they can be mined through open-pit methods.

2. Crushing and Grinding: The mined bauxite is crushed and ground into fine particles to increase its surface area for better digestion.

3. Digestion: The crushed bauxite is mixed with a sodium hydroxide solution and heated under pressure. This process, known as digestion, dissolves the aluminium oxide present in bauxite and converts it into sodium aluminate.

4. Precipitation: The sodium aluminate solution is cooled and treated with carbon dioxide gas, which causes precipitation of aluminium hydroxide.

5. Calcination: The aluminium hydroxide is heated to a high temperature to remove the water content and convert it into alumina (aluminium oxide).

6. Electrolysis: The alumina is then dissolved in a molten cryolite bath and subjected to electrolysis, where it is broken down into aluminium metal and oxygen.

Conclusion:
In conclusion, the ore of aluminium is bauxite. It is a naturally occurring rock-like substance that contains aluminium oxide and other minerals. The extraction of aluminium from bauxite involves several processes, including mining, crushing, digestion, precipitation, calcination, and electrolysis.

Answer

Baxuite is world primary source of aluminium

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